Pub Date : 2024-08-06DOI: 10.1038/s41560-024-01597-5
Juan-Pablo Correa-Baena
Interfacial engineering is key to ensure the long-term stability of perovskite solar cells. Research now shows that chiral molecules can both improve the mechanical stability of the interfaces and afford passivation of defects at the perovskite surface, making solar cells more tolerant to thermal cycling stress.
{"title":"Chirality for stable interfaces","authors":"Juan-Pablo Correa-Baena","doi":"10.1038/s41560-024-01597-5","DOIUrl":"https://doi.org/10.1038/s41560-024-01597-5","url":null,"abstract":"Interfacial engineering is key to ensure the long-term stability of perovskite solar cells. Research now shows that chiral molecules can both improve the mechanical stability of the interfaces and afford passivation of defects at the perovskite surface, making solar cells more tolerant to thermal cycling stress.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":56.7,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141895384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The anion-exchange-membrane fuel cell (AEMFC) is an attractive and cost-effective energy-conversion technology because it can use Earth-abundant and low-cost non-precious metal catalysts. However, non-precious metals used in AEMFCs to catalyse the hydrogen oxidation reaction are prone to self-oxidation, resulting in irreversible failure. Here we show a quantum well-like catalytic structure (QWCS), constructed by atomically confining Ni nanoparticles within a carbon-doped-MoOx/MoOx heterojunction (C-MoOx/MoOx) that can selectively transfer external electrons from the hydrogen oxidation reaction while remaining itself metallic. Electrons of Ni nanoparticles gain a barrier of 1.11 eV provided by the QWCS leading to Ni stability up to 1.2 V versus the reversible hydrogen electrode (VRHE) whereas electrons released from the hydrogen oxidation reaction easily cross the barrier by a gating operation of QWCS upon hydrogen adsorption. The QWCS-catalysed AEMFC achieved a high-power density of 486 mW mgNi−1 and withstood hydrogen starvation operations during shutdown–start cycles, whereas a counterpart AEMFC without QWCS failed in a single cycle. Non-precious metals used at the anode of anion-exchange-membrane fuel cells to catalyse hydrogen oxidation are prone to self-oxidation. Here Zhou and colleagues report that a quantum well-like catalytic structure containing Ni nanoparticles within a C-doped MoOx/MoOx heterojunction can mitigate such degradation by a gating operation.
{"title":"Quantum confinement-induced anti-electrooxidation of metallic nickel electrocatalysts for hydrogen oxidation","authors":"Yuanyuan Zhou, Wei Yuan, Mengting Li, Zhenyang Xie, Xiaoyun Song, Yang Yang, Jian Wang, Li Li, Wei Ding, Wen-Feng Lin, Zidong Wei","doi":"10.1038/s41560-024-01604-9","DOIUrl":"10.1038/s41560-024-01604-9","url":null,"abstract":"The anion-exchange-membrane fuel cell (AEMFC) is an attractive and cost-effective energy-conversion technology because it can use Earth-abundant and low-cost non-precious metal catalysts. However, non-precious metals used in AEMFCs to catalyse the hydrogen oxidation reaction are prone to self-oxidation, resulting in irreversible failure. Here we show a quantum well-like catalytic structure (QWCS), constructed by atomically confining Ni nanoparticles within a carbon-doped-MoOx/MoOx heterojunction (C-MoOx/MoOx) that can selectively transfer external electrons from the hydrogen oxidation reaction while remaining itself metallic. Electrons of Ni nanoparticles gain a barrier of 1.11 eV provided by the QWCS leading to Ni stability up to 1.2 V versus the reversible hydrogen electrode (VRHE) whereas electrons released from the hydrogen oxidation reaction easily cross the barrier by a gating operation of QWCS upon hydrogen adsorption. The QWCS-catalysed AEMFC achieved a high-power density of 486 mW mgNi−1 and withstood hydrogen starvation operations during shutdown–start cycles, whereas a counterpart AEMFC without QWCS failed in a single cycle. Non-precious metals used at the anode of anion-exchange-membrane fuel cells to catalyse hydrogen oxidation are prone to self-oxidation. Here Zhou and colleagues report that a quantum well-like catalytic structure containing Ni nanoparticles within a C-doped MoOx/MoOx heterojunction can mitigate such degradation by a gating operation.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41560-024-01604-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141895393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-02DOI: 10.1038/s41560-024-01610-x
Qing Zhao
The surfaces of polycrystalline perovskite films impact the long-term performance of perovskite solar cells, yet their microstructure is not well understood. Research now reveals the existence of concave grain structures at the surface of the perovskite layer facing the electron transport layer, and their detrimental effect on the stability of the interface and eventually the devices.
{"title":"Smoothing down interfaces","authors":"Qing Zhao","doi":"10.1038/s41560-024-01610-x","DOIUrl":"10.1038/s41560-024-01610-x","url":null,"abstract":"The surfaces of polycrystalline perovskite films impact the long-term performance of perovskite solar cells, yet their microstructure is not well understood. Research now reveals the existence of concave grain structures at the surface of the perovskite layer facing the electron transport layer, and their detrimental effect on the stability of the interface and eventually the devices.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-02DOI: 10.1038/s41560-024-01599-3
Fei Zhang
High-efficiency perovskite solar cells suffer from limited operational stability. Research now shows that perovskitoid-based interlayers with strong metal halide octahedral connectivity and both out-of-plane and in-plane crystal orientations address this issue.
{"title":"Connectivity matters","authors":"Fei Zhang","doi":"10.1038/s41560-024-01599-3","DOIUrl":"10.1038/s41560-024-01599-3","url":null,"abstract":"High-efficiency perovskite solar cells suffer from limited operational stability. Research now shows that perovskitoid-based interlayers with strong metal halide octahedral connectivity and both out-of-plane and in-plane crystal orientations address this issue.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-02DOI: 10.1038/s41560-024-01591-x
Amrita Singh-Morgan, Victor Mougel
Electrochemical reduction of CO2 from flue gas shows promise for producing chemicals and fuels from waste streams, but its implementation is challenged by the presence of SO2 impurities. Research now demonstrates a catalyst that effectively converts CO2 to multi-carbon products while tolerating SO2 impurities, advancing the feasibility of industrial CO2 utilization.
{"title":"Scrubbing the need for flue gas purification","authors":"Amrita Singh-Morgan, Victor Mougel","doi":"10.1038/s41560-024-01591-x","DOIUrl":"10.1038/s41560-024-01591-x","url":null,"abstract":"Electrochemical reduction of CO2 from flue gas shows promise for producing chemicals and fuels from waste streams, but its implementation is challenged by the presence of SO2 impurities. Research now demonstrates a catalyst that effectively converts CO2 to multi-carbon products while tolerating SO2 impurities, advancing the feasibility of industrial CO2 utilization.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-02DOI: 10.1038/s41560-024-01605-8
Tongchao Liu, Lei Yu, Junxiang Liu, Alvin Dai, Tao Zhou, Jing Wang, Weiyuan Huang, Luxi Li, Matthew Li, Tianyi Li, Xiaojing Huang, Xianghui Xiao, Mingyuan Ge, Lu Ma, Zengqing Zhuo, Rachid Amine, Yong S. Chu, Wah-Keat Lee, Jianguo Wen, Khalil Amine
Cathodes for next-generation batteries are pressed for higher voltage operation (≥4.5 V) to achieve high capacity with long cyclability and thermal tolerance. Current cathodes fail to meet these requirements owing to structural and electrochemical strains at high voltages, leading to fast capacity fading. Here we present a cathode with a coherent architecture ranging from ordered to disordered frameworks with concentration gradient and controllable Ni oxidation activities, which can overcome voltage ceilings imposed by existing cathodes. This design enables simultaneous high-capacity and high-voltage operation at 4.5 V without capacity fading, and up to 4.7 V with negligible capacity decay. Multiscale diffraction and imaging techniques reveal the disordered surface is electrochemically and structurally indestructible, preventing surface parasitic reactions and phase transitions. Structural coherence from ordering to disordering limits lattice parameter changes, mitigating lattice strain and enhancing morphological integrity. The dual-gradient design also notably improves thermal stability, driving the advancement of high-performance cathode materials. Battery cathodes tend to degrade severely during high-voltage operations. Here the authors present a cathode design with a structurally coherent architecture, ranging from ordered to disordered frameworks, that addresses this issue.
下一代电池的阴极需要更高的工作电压（≥4.5 V），以实现高容量、长循环性和耐热性。目前的阴极无法满足这些要求，因为在高电压下会产生结构和电化学应变，导致容量快速衰减。在这里，我们提出了一种具有从有序框架到无序框架的连贯结构、浓度梯度和可控镍氧化活性的阴极，它可以克服现有阴极施加的电压上限。这种设计可在 4.5 V 电压下同时实现高容量和高电压运行，且不会出现容量衰减，在高达 4.7 V 电压下，容量衰减可忽略不计。多尺度衍射和成像技术揭示了无序表面在电化学和结构上的不可破坏性，防止了表面寄生反应和相变。从有序到无序的结构一致性限制了晶格参数的变化，减轻了晶格应变，增强了形态完整性。双梯度设计还显著提高了热稳定性，推动了高性能阴极材料的发展。
{"title":"Ultrastable cathodes enabled by compositional and structural dual-gradient design","authors":"Tongchao Liu, Lei Yu, Junxiang Liu, Alvin Dai, Tao Zhou, Jing Wang, Weiyuan Huang, Luxi Li, Matthew Li, Tianyi Li, Xiaojing Huang, Xianghui Xiao, Mingyuan Ge, Lu Ma, Zengqing Zhuo, Rachid Amine, Yong S. Chu, Wah-Keat Lee, Jianguo Wen, Khalil Amine","doi":"10.1038/s41560-024-01605-8","DOIUrl":"10.1038/s41560-024-01605-8","url":null,"abstract":"Cathodes for next-generation batteries are pressed for higher voltage operation (≥4.5 V) to achieve high capacity with long cyclability and thermal tolerance. Current cathodes fail to meet these requirements owing to structural and electrochemical strains at high voltages, leading to fast capacity fading. Here we present a cathode with a coherent architecture ranging from ordered to disordered frameworks with concentration gradient and controllable Ni oxidation activities, which can overcome voltage ceilings imposed by existing cathodes. This design enables simultaneous high-capacity and high-voltage operation at 4.5 V without capacity fading, and up to 4.7 V with negligible capacity decay. Multiscale diffraction and imaging techniques reveal the disordered surface is electrochemically and structurally indestructible, preventing surface parasitic reactions and phase transitions. Structural coherence from ordering to disordering limits lattice parameter changes, mitigating lattice strain and enhancing morphological integrity. The dual-gradient design also notably improves thermal stability, driving the advancement of high-performance cathode materials. Battery cathodes tend to degrade severely during high-voltage operations. Here the authors present a cathode design with a structurally coherent architecture, ranging from ordered to disordered frameworks, that addresses this issue.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1038/s41560-024-01580-0
Xiaohan Liu, Patrick Plötz, Sonia Yeh, Zhengke Liu, Xiaoyue Cathy Liu, Xiaolei Ma
Transportation is undergoing rapid electrification, with electric buses at the forefront of public transport, especially in China. This transition, however, could strain electricity grids. Using a large-scale dataset with over 200 million global positioning system records from 20,992 buses in Beijing, we explore the technical, economic and environmental implications of transforming public transport depots into renewable energy hubs. Here we show that solar photovoltaic reduces the grid’s net charging load by 23% during electricity generation periods and lowers the net charging peak load by 8.6%. Integrating energy storage amplifies these reductions to 28% and 37.4%, respectively. Whereas unsubsidized solar photovoltaic yields profit 64% above costs, adding battery storage cuts profits to 31% despite offering grid benefits. Negative marginal abatement gains for CO2 emissions underscore the economic sustainability. Our findings provide a model for cities worldwide to accelerate their commitments towards sustainable transport and energy systems. Electric bus charging could strain electricity grids with intensive charging. Here the authors present a data-driven framework to transform bus depots into grid-friendly profitable energy hubs using solar photovoltaic and energy storage systems.
{"title":"Transforming public transport depots into profitable energy hubs","authors":"Xiaohan Liu, Patrick Plötz, Sonia Yeh, Zhengke Liu, Xiaoyue Cathy Liu, Xiaolei Ma","doi":"10.1038/s41560-024-01580-0","DOIUrl":"10.1038/s41560-024-01580-0","url":null,"abstract":"Transportation is undergoing rapid electrification, with electric buses at the forefront of public transport, especially in China. This transition, however, could strain electricity grids. Using a large-scale dataset with over 200 million global positioning system records from 20,992 buses in Beijing, we explore the technical, economic and environmental implications of transforming public transport depots into renewable energy hubs. Here we show that solar photovoltaic reduces the grid’s net charging load by 23% during electricity generation periods and lowers the net charging peak load by 8.6%. Integrating energy storage amplifies these reductions to 28% and 37.4%, respectively. Whereas unsubsidized solar photovoltaic yields profit 64% above costs, adding battery storage cuts profits to 31% despite offering grid benefits. Negative marginal abatement gains for CO2 emissions underscore the economic sustainability. Our findings provide a model for cities worldwide to accelerate their commitments towards sustainable transport and energy systems. Electric bus charging could strain electricity grids with intensive charging. Here the authors present a data-driven framework to transform bus depots into grid-friendly profitable energy hubs using solar photovoltaic and energy storage systems.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1038/s41560-024-01603-w
Holly Caggiano, Sara M. Constantino, Chris Greig, Elke U. Weber
Rapidly building utility-scale energy infrastructure requires not only public support but also political will across levels of government. Here we use a conjoint experiment to assess preferences for large-scale energy projects among residents and local elected officials in Pennsylvania—a key transition state with high solar potential where siting authority rests at the local level. We find that residents prefer solar to other energy projects, and job creation and cooperative community ownership are associated with increased support. Public and elected official support decreases when projects are owned by foreign companies. We find limited partisan differences in preferences, suggesting a path towards bipartisan support for such projects. Elected officials misperceive their constituents’ preferences, underestimating support for renewable energy and the importance of job creation. As local officials are key decision-makers regarding infrastructure development, their preferences and perceptions of constituents’ preferences may dictate which energy projects are approved and what community benefits they deliver. Pennsylvanians support energy infrastructure projects that use solar, create jobs and are community owned. Elected officials misperceive constituents’ preferences, underestimating support for renewable energy and job creation.
{"title":"Public and local policymaker preferences for large-scale energy project characteristics","authors":"Holly Caggiano, Sara M. Constantino, Chris Greig, Elke U. Weber","doi":"10.1038/s41560-024-01603-w","DOIUrl":"10.1038/s41560-024-01603-w","url":null,"abstract":"Rapidly building utility-scale energy infrastructure requires not only public support but also political will across levels of government. Here we use a conjoint experiment to assess preferences for large-scale energy projects among residents and local elected officials in Pennsylvania—a key transition state with high solar potential where siting authority rests at the local level. We find that residents prefer solar to other energy projects, and job creation and cooperative community ownership are associated with increased support. Public and elected official support decreases when projects are owned by foreign companies. We find limited partisan differences in preferences, suggesting a path towards bipartisan support for such projects. Elected officials misperceive their constituents’ preferences, underestimating support for renewable energy and the importance of job creation. As local officials are key decision-makers regarding infrastructure development, their preferences and perceptions of constituents’ preferences may dictate which energy projects are approved and what community benefits they deliver. Pennsylvanians support energy infrastructure projects that use solar, create jobs and are community owned. Elected officials misperceive constituents’ preferences, underestimating support for renewable energy and job creation.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-31DOI: 10.1038/s41560-024-01596-6
Longfei Cui, Shu Zhang, Jiangwei Ju, Tao Liu, Yue Zheng, Jiahao Xu, Yantao Wang, Jiedong Li, Jingwen Zhao, Jun Ma, Jinzhi Wang, Gaojie Xu, Ting-Shan Chan, Yu-Cheng Huang, Shu-Chih Haw, Jin-Ming Chen, Zhiwei Hu, Guanglei Cui
All-solid-state lithium batteries typically employ heterogeneous composite cathodes where conductive additives are introduced to improve mixed conduction. These electrochemically inactive additives are not fully compatible with layered oxide cathodes that undergo large volume change, significantly reducing battery energy density and cycle life. Here we propose a cathode homogenization strategy by cold pressing a zero-strain cathode material with efficient mixed conduction throughout the (dis)charge process. Li1.75Ti2(Ge0.25P0.75S3.8Se0.2)3 possesses considerable Li+/electronic conductivity of 0.22/242 mS cm−1 when fully charged, increasing monotonically to 0.66/412 mS cm−1 when fully discharged. It delivers a specific capacity of 250 mAh g−1 and undergoes a 1.2% volume change. Homogeneous cathodes composed of 100% Li1.75Ti2(Ge0.25P0.75S3.8Se0.2)3 enable room-temperature all-solid-state lithium batteries to achieve a cycle life of over 20,000 cycles at 2.5 C with a specific capacity retention of 70% and a high energy density of 390 Wh kg−1 at the cell level at 0.1 C. This cathode homogenization strategy contrasts to the conventional cathode heterogeneous design, potentially improving the viability of all-solid-state lithium batteries for commercial applications. Solid-state lithium batteries typically utilize heterogeneous composite cathodes with conductive additives, which limit energy density and cycle life. Here the authors present a cathode material that exhibits efficient mixed conduction and near-zero volume change during cycling, thereby improving battery performance.
全固态锂电池通常采用异质复合阴极，其中引入了导电添加剂以改善混合传导。这些电化学不活跃的添加剂与体积变化较大的层状氧化物阴极并不完全兼容，从而大大降低了电池的能量密度和循环寿命。在此，我们提出了一种阴极均匀化策略，即在整个（去）充电过程中冷压一种具有高效混合传导能力的零应变阴极材料。Li1.75Ti2(Ge0.25P0.75S3.8Se0.2)3具有相当高的锂+/电导率，完全充电时为0.22/242 mS cm-1，完全放电时单调增加到0.66/412 mS cm-1。它的比容量为 250 mAh g-1，体积变化率为 1.2%。由 100% Li1.75Ti2(Ge0.25P0.75S3.8Se0.2)3组成的均质正极使室温全固态锂电池在 2.5 摄氏度下的循环寿命超过 20,000 次，比容量保持率达 70%，在 0.1 摄氏度下的电池能量密度高达 390 Wh kg-1。这种阴极均匀化策略与传统的阴极异质设计形成鲜明对比，有可能提高全固态锂电池在商业应用中的可行性。
{"title":"A cathode homogenization strategy for enabling long-cycle-life all-solid-state lithium batteries","authors":"Longfei Cui, Shu Zhang, Jiangwei Ju, Tao Liu, Yue Zheng, Jiahao Xu, Yantao Wang, Jiedong Li, Jingwen Zhao, Jun Ma, Jinzhi Wang, Gaojie Xu, Ting-Shan Chan, Yu-Cheng Huang, Shu-Chih Haw, Jin-Ming Chen, Zhiwei Hu, Guanglei Cui","doi":"10.1038/s41560-024-01596-6","DOIUrl":"10.1038/s41560-024-01596-6","url":null,"abstract":"All-solid-state lithium batteries typically employ heterogeneous composite cathodes where conductive additives are introduced to improve mixed conduction. These electrochemically inactive additives are not fully compatible with layered oxide cathodes that undergo large volume change, significantly reducing battery energy density and cycle life. Here we propose a cathode homogenization strategy by cold pressing a zero-strain cathode material with efficient mixed conduction throughout the (dis)charge process. Li1.75Ti2(Ge0.25P0.75S3.8Se0.2)3 possesses considerable Li+/electronic conductivity of 0.22/242 mS cm−1 when fully charged, increasing monotonically to 0.66/412 mS cm−1 when fully discharged. It delivers a specific capacity of 250 mAh g−1 and undergoes a 1.2% volume change. Homogeneous cathodes composed of 100% Li1.75Ti2(Ge0.25P0.75S3.8Se0.2)3 enable room-temperature all-solid-state lithium batteries to achieve a cycle life of over 20,000 cycles at 2.5 C with a specific capacity retention of 70% and a high energy density of 390 Wh kg−1 at the cell level at 0.1 C. This cathode homogenization strategy contrasts to the conventional cathode heterogeneous design, potentially improving the viability of all-solid-state lithium batteries for commercial applications. Solid-state lithium batteries typically utilize heterogeneous composite cathodes with conductive additives, which limit energy density and cycle life. Here the authors present a cathode material that exhibits efficient mixed conduction and near-zero volume change during cycling, thereby improving battery performance.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141857697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：