Jun Wang , Xiuyang Zou , Shen Zhang , Biyu Jin , Jiao Huang , Yongyuan Ren , Feng Gao , Yang Hou , Jianguo Lu , Xiaoli Zhan , Qinghua Zhang
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引用次数: 0
Abstract
To achieve commercial-grade lifespan and charge-discharge efficiency in aqueous zinc-ion batteries, a crucial prerequisite is establishing a robust and compatible electrode-electrolyte interface to mitigate the challenges posed by excessive dendrite proliferation and side reactions. Herein, we ingeniously engineer a durable interface layer on the zinc foil surface through an In-situ chemical grafting approach using silane as a molecular bridge (SG@Zn. This functionalized polysilane layer successfully welds the metallic substrate and the organic segments, fostering a highly compatible interface via robust Si-O-Zn bonds, serving as a shielding layer to protect the electrode from corrosion. The silane framework facilitates the uniform anchoring of subsequent zinc-affinitive functional groups at the molecular level, which not only brings a rapid zinc ion reaction kinetics but also ensures dual enhancement against expansion inhibition and dendrite penetration. Consequently, the symmetrical battery thus showcases superior reversibility in stripping/planting processes and demonstrates negligible voltage fluctuations at various currents and capacities. The MnO2-based full batteries maintain a capacity of 200 mAh g -1 with a negligible cyclic capacity decay rate of 0.017% over 700 cycles at 1 C. This work offers a valuable perspective on interface engineering for high performance aqueous zinc-ion batteries.
为了实现商业级锌离子电池的使用寿命和充放电效率,一个关键的先决条件是建立一个强大且兼容的电极-电解质界面,以减轻过度枝晶增殖和副反应带来的挑战。在此,我们巧妙地通过原位化学接枝方法在锌箔表面设计了一个耐用的界面层,使用硅烷作为分子桥接(SG@Zn)。这种功能化的聚硅烷层成功地焊接了金属衬底和有机部分,通过坚固的Si-O-Zn键形成了高度兼容的界面,作为屏蔽层保护电极免受腐蚀。硅烷框架有助于在分子水平上均匀锚定后续的锌亲和官能团,这不仅带来了快速的锌离子反应动力学,而且确保了抗膨胀抑制和枝晶渗透的双重增强。因此,对称电池在剥离/种植过程中表现出优越的可逆性,并且在各种电流和容量下表现出可忽略不计的电压波动。在室温下,mno2基全电池在700次循环中保持200 mAh g -1的容量,循环容量衰减率为0.017%,可以忽略。该研究为高性能水性锌离子电池的界面工程提供了有价值的视角。
期刊介绍:
Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field.
Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy.
Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.