文献类型：期刊文献

英文题名：Zinc iso-plating/stripping: toward a practical Zn powder anode with ultra-long life over 5600 h

作者：Chen, Hongli[1];Zhang, Wanyu[1];Yi, Shan[1];Su, Zhe[1];Zhao, Zhiqiang[1];Zhang, Yayun[1];Niu, Bo[1];Long, Donghui[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai 200237, Peoples R China

年份：2024

卷号：17

期号：9

起止页码：3146

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;EI(收录号：20241715949572);WOS:【SCI-EXPANDED(收录号:WOS:001203671400001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 22078100, No. 52102098, and No. 22008073) and the Fundamental Research Funds for the Central Universities (No. 222201718002). The authors would like to thank Shiyanjia Lab (www.shiyanjia.com) for the XRD tests.

语种：英文

外文关键词：Failure (mechanical) - Powder metals - Stability

摘要：Zn powder with large-scale production and good tunability is promising for aqueous Zn-ion batteries, but its extremely short lifespan seriously hinders the practical application. Herein, we disclose that Zn powder anode failure is majorly caused by top-down plating and bottom-up stripping behaviors. Therefore, an iso-plating/stripping strategy has to be developed accordingly to achieve an ultra-long lifetime Zn powder anode for practical applications. Zincophilic Bi-metal nanosheets are anchored on the Zn powder surface, which could serve as preferred Zn nucleation sites and charge-aggregated protrusions, leading to homogeneous plating/stripping and gradient-free Zn2+ distribution throughout the powder electrode. Furthermore, Bi has additional advantages including the ability to guide Zn(002)-orientated growth and suppress side reactions for achieving further structural stability, permitting unprecedented stable cycling of over 5600 h at 1 mA cm-2 and 585 h even at 15 mA cm-2. The corresponding Bi@Zn powder//MnO2 full batteries feature an extraordinary capacity retention of 82.12% after 1150 cycles at 2 A g-1 and a low negative/positive electrode capacity ratio of 6.65. When applied in pouch-type batteries, Bi@Zn powder delivers an impressive energy density of 138.6 W h kg-1 at a superfast power density of 700 W kg-1. This study clarifies the failure mechanism of the Zn powder anode and develops a concise yet effective strategy that paves the way for fabricating practical Zn anodes with a long life and dendrite-free structure. A zincophilic Bi-metal nanosheets guiding iso-plating/stripping strategy is developed to overcome Zn powder anode collapse and achieve ultra-long life.