Qianyan Wang, Minsheng Wu, Yunkai Xu, Chuyue Li, Yuanjia Rong, Yaling Liao, Menglin Gao, Xiaoping Zhang, Weirong Chen, Jun Lu
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引用次数: 0
摘要
金属锂以其无与伦比的理论比容量和极低的电化学电位成为最有前途的负极。然而,锂枝晶的不可控生长以及反应中间体和有机电解质的严重副反应仍然限制了锂金属电池的广泛应用。在此,我们提出用 4-硝基苯磺酰氟(NBSF)作为电解质添加剂,在锂表面形成稳定的有机-无机混合固体电解质相(SEI)层。氟化锂和氮化锂的大量存在保证了 SEI 层的韧性和高离子导电性,实现了无树枝状锂沉积。同时,NBSF 的苯基对 SEI 层的化学稳定性和对锂负极体积变化的良好适应性都有显著贡献。使用 NBSF 的锂-氧电池具有较长的循环寿命和出色的循环稳定性。这种简单的方法有望改善有机-无机 SEI 层的发展,从而稳定锂-氧电池的锂阳极。
In situ high-quality LiF/Li3N inorganic and phenyl-based organic solid electrolyte interphases for advanced lithium–oxygen batteries
Lithium metal shows a great advantage as the most promising anode for its unparalleled theoretical specific capacity and extremely low electrochemical potential. However, uncontrolled lithium dendrite growth and severe side reactions of the reactive intermediates and organic electrolytes still limit the broad application of lithium metal batteries. Herein, we propose 4-nitrobenzenesulfonyl fluoride (NBSF) as an electrolyte additive for forming a stable organic–inorganic hybrid solid electrolyte interphase (SEI) layer on the lithium surface. The abundance of lithium fluoride and lithium nitride can guarantee the SEI layer's toughness and high ionic conductivity, achieving dendrite-free lithium deposition. Meanwhile, the phenyl group of NBSF significantly contributes to both the chemical stability of the SEI layer and the good adaptation to volume changes of the lithium anode. The lithium–oxygen batteries with NBSF exhibit prolonged cycle lives and excellent cycling stability. This simple approach is hoped to improve the development of the organic–inorganic SEI layer to stabilize the lithium anodes for lithium–oxygen batteries.
期刊介绍:
Carbon Energy is an international journal that focuses on cutting-edge energy technology involving carbon utilization and carbon emission control. It provides a platform for researchers to communicate their findings and critical opinions and aims to bring together the communities of advanced material and energy. The journal covers a broad range of energy technologies, including energy storage, photocatalysis, electrocatalysis, photoelectrocatalysis, and thermocatalysis. It covers all forms of energy, from conventional electric and thermal energy to those that catalyze chemical and biological transformations. Additionally, Carbon Energy promotes new technologies for controlling carbon emissions and the green production of carbon materials. The journal welcomes innovative interdisciplinary research with wide impact. It is indexed in various databases, including Advanced Technologies & Aerospace Collection/Database, Biological Science Collection/Database, CAS, DOAJ, Environmental Science Collection/Database, Web of Science and Technology Collection.