期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 5, 页码 2899-2904出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b10616
关键词
silicon; binder; polyaerylic acid; dopamine; lithium-ion batteries
资金
- State Key 973 Program of PRC [2014CB932303]
- SJTU-UM project
- China Postdoctoral Science Foundation [2015M581620]
A robust silicon electrode for lithium-ion battery has been developed via prepolymerizing dopamine on silicon particle surface and then chemical binding with poly(acrylic acid) (PAA). In this favorable electrode, silicon nanoparticles are covered by a thin layer of polydopamine (PD) through firm hydrogen bonds between phenolic hydroxyl and hydroxyl, while the elastic polymer layer reacts with PAA binder to form three-dimensional cross-linked binding system. The Si@PD/PAA electrode exhibits more stable cycle performance than conventional electrodes. In the case of thick electrode, a capacity of 3.69 mA h cm(-2) and fairly good rechargeability for 80 cycles can be achieved.
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