Affiliation:
1. CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular Sciences Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
2. University of Chinese Academy of Sciences (UCAS) Beijing 100049 P. R. China
3. College of Materials Science and Engineering State Key Laboratory of Biopolysaccharide Fiber Forming and Eco‐Textile Qingdao University Qingdao Shandong 266071 P. R. China
4. Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Analytical Chemistry for Living Biosystems CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
Abstract
AbstractHigh‐energy lithium‐ion batteries built with silicon‐based anode materials are usually associated with short cycle lives due to mechanical failure at an anode level and more importantly, due to electrochemical failure at a cell level as a result of irreversible consumption of cathode Li during initial charge. (Electro)chemical prelithiation has shown promises to compensate initial Li loss and improve cycling performance of the battery. However, previous strategies applied directly at anode or cathode could raise concerns on safety and degraded electrode structure, and are less compatible with industrial manufacture of batteries. Here, a new concept of prelithiation by lithiation agents supported functional separator, which is highly adaptive to electrode preparation, battery manufacture and formation, and is capable of, by simply adjusting cell voltage, not only replenishing cathode Li loss but re‐uptaking anode Li to inhibit local over‐lithiation and dendrite formation, is shown. By employing the functional separator, a 3‐Ah Li‐ion pouch cell that pairs a silicon‐based anode and a high‐nickel layered oxide cathode demonstrates stable energy output of >330 Wh kg−1 and much improved cycling performance.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Beijing Municipality
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
16 articles.
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