材料科学
聚丙烯酸
法拉第效率
阳极
石墨
电化学
电极
锂(药物)
纳米颗粒
纳米技术
电流密度
复合材料
化学工程
聚合物
物理化学
化学
内分泌学
工程类
物理
医学
量子力学
作者
Zeheng Li,Weiting Tang,Yajun Yang,Guoyong Lai,Zheng Lin,Huayan Xiao,Juncheng Qiu,Xiujuan Wei,Shuxing Wu,Zhan Lin
标识
DOI:10.1002/adfm.202206615
摘要
Abstract The low initial Coulombic efficiency (ICE) and insufficient cycling lives of silicon (Si)‐based anodes seriously hinder their eventual introduction into next‐generation high‐energy‐density lithium–ion batteries (LIBs). Herein, an engineering prelithiation binder strategy based on polyacrylic acid (Li x PAA) is proposed for representative SiO x anodes. The ICEs and cycling lives of SiO x anodes are significantly improved by precisely controlling the lithiation degree of PAA binder. The ICE of the high‐loading (3.0 mg cm −2 ) SiO x electrode increases by 10.9% when the Li 0.75 PAA binder replaces the PAA binder. Moreover, the working mechanism of the lithiation binder strategy to improve the electrochemical performances (especially for ICE) is systematically investigated, which is universally applied to other Si anodes such as Si nanoparticles and Si/graphite. This universal binder strategy and proposed working mechanism provide enlightenment on constructing high‐ICE, high‐energy‐density, and long‐life Si‐based anodes.
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