Engineering Prelithiation of Polyacrylic Acid Binder: A Universal Strategy to Boost Initial Coulombic Efficiency for High-Areal-Capacity Si-Based Anodes

Zeheng Li; Weiting Tang; Yajun YangGuoyong LaiZheng LinHuayan XiaoJuncheng QiuXiujuan WeiShuxing WuZhan Lin

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Engineering Prelithiation of Polyacrylic Acid Binder: A Universal Strategy to Boost Initial Coulombic Efficiency for High-Areal-Capacity Si-Based Anodes

机译：Engineering Prelithiation of Polyacrylic Acid Binder: A Universal Strategy to Boost Initial Coulombic Efficiency for High-Areal-Capacity Si-Based Anodes

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The low initial Coulombic efficiency (ICE) and insufficient cycling lives ofsilicon (Si)-based anodes seriously hinder their eventual introduction intonext-generation high-energy-density lithium–ion batteries (LIBs). Herein, anengineering prelithiation binder strategy based on polyacrylic acid (LixPAA)is proposed for representative SiO_x anodes. The ICEs and cycling lives ofSiO_x anodes are significantly improved by precisely controlling the lithiationdegree of PAA binder. The ICE of the high-loading (3.0 mg cm~(?2)) SiO_xelectrode increases by 10.9% when the Li_(0.75)PAA binder replaces the PAAbinder. Moreover, the working mechanism of the lithiation binder strategy toimprove the electrochemical performances (especially for ICE) is systematicallyinvestigated, which is universally applied to other Si anodes such as Sinanoparticles and Si/graphite. This universal binder strategy and proposedworking mechanism provide enlightenment on constructing high-ICE, highenergy-density, and long-life Si-based anodes.

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来源
《Advanced functional materials》 |2022年第40期|2206615.1-2206615.13|共13页
作者
Zeheng Li; Weiting Tang; Yajun YangGuoyong LaiZheng LinHuayan XiaoJuncheng QiuXiujuan WeiShuxing WuZhan Lin;
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Guangdong Provincial Key Laboratory of Plant Resources BiorefineryGuangzhou Key Laboratory of Clean Transportation Energy ChemistrySchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006, China;

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正文语种英语
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high initial Coulombic efficiency; lithiation degree; lithium–ion batteries; polymeric binder; silicon-based anodes;

Engineering Prelithiation of Polyacrylic Acid Binder: A Universal Strategy to Boost Initial Coulombic Efficiency for High-Areal-Capacity Si-Based Anodes

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