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Li‐Metal‐Free Prelithiation of Si‐Based Negative Electrodes for Full Li‐Ion Batteries
Author(s) -
Zhou Haitao,
Wang Xuehang,
Chen De
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500287
Subject(s) - electrode , electrolyte , battery (electricity) , metal , materials science , ion , inorganic chemistry , chemistry , chemical engineering , metallurgy , power (physics) , organic chemistry , quantum mechanics , engineering , physics
Most of the high‐capacity positive‐electrode materials [for example, S, O 2 (air), and MO x (M: V, Mn, Fe, etc.)] are Li‐deficient and require the use of a Li‐metal electrode or prelithiation. Herein, we report a novel electrolytic cell in which the Si electrode can be prelithiated in a well‐controlled manner from Li‐containing aqueous solution in a Li‐metal‐free way. MnO x /Si and S/Si Li‐ion full cells were assembled by using the prelithiated Si negative electrodes, which resulted in high specific energies of 349 and 732 Wh kg −1 , respectively. The MnO x /Si full cell still retains 138 Wh kg −1 even at a high specific power of 1710 W kg −1 . This is the first report of a whole process of making a full Li‐ion battery with both Li‐deficient electrodes without the use of Li metal as the Li source. This novel prelithiation process, with high controllability, no short circuiting, and an abundant Li source, is expected to contribute significantly to the development of safe, green, and powerful Li‐ion batteries.