Novel multi-block conductive binder with polybutadiene for Si anodes in lithium-ion batteries

Ye, Qingqin1; Zheng, Peitao2; Ao, Xiaohu1; Yao, Dahua1; Lei, Zhiwen1; Deng, Yonghong2; Wang, Chaoyang1

2019-08-20

10.1016/j.electacta.2019.05.093

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

Using conductive binders, instead of the traditional binders and conductive additives, is an effective way to increase the specific capacity and long cycle life of the silicon (Si) anode. However, the rigid conductive binders of Si anodes tend to form cracks during the repetitive huge volume changes of Si. Here, a novel n-type conductive binder, multi-block polymer of poly(1-pyrenemethyl methacrylate) and polybutadiene (PPy-b-PB) was designed. The polybutadiene (PB) rubber was incorporated into the conductive binder by combining condensation and reversible addition-fragmentation chain transfer polymerization. With high initial coulombic efficiency of 77.9%, the PPy-b-PB/Si anode possesses high reversible capacity (2274 mAh g(-1)) and capacity retention (87.1%) at the rate of 0.2 C (0.84 A g(-1)) after 200 cycles. The superior cyclic performance of the PPy-b-PB can be ascribed to the PB rubber, which enhanced the reversible deformation ability, flexibility, and adhesion length scale of the binder, without with a negligible change of the charge-transfer resistance for the anode. The original structure and the preparation method of the multi-block conductive binder provide a new way to manufacture multifunctional binders. (C) 2019 Elsevier Ltd. All rights reserved.

Conductive binder Polybutadiene Silicon anode Lithium-ion battery Multi-block

SCI ; EI

英语

通讯

State Key Program of National Natural Science of China[51732005]

Electrochemistry

Electrochemistry

WOS:000470108800008

PERGAMON-ELSEVIER SCIENCE LTD

20192307003359

Additives ; Anodes ; Binders ; Block copolymers ; Charge transfer ; Polybutadienes ; Rubber ; Silicon ; Silicon batteries

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electric Batteries:702.1 ; Electron Tubes:714.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Polymeric Materials:815.1 ; Organic Polymers:815.1.1 ; Natural Rubber:818.1

CHEMISTRY

Web of Science

1.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Ye, Qingqin,Zheng, Peitao,Ao, Xiaohu,et al. Novel multi-block conductive binder with polybutadiene for Si anodes in lithium-ion batteries[J]. ELECTROCHIMICA ACTA,2019,315:58-66.

Ye, Qingqin.,Zheng, Peitao.,Ao, Xiaohu.,Yao, Dahua.,Lei, Zhiwen.,...&Wang, Chaoyang.(2019).Novel multi-block conductive binder with polybutadiene for Si anodes in lithium-ion batteries.ELECTROCHIMICA ACTA,315,58-66.

Ye, Qingqin,et al."Novel multi-block conductive binder with polybutadiene for Si anodes in lithium-ion batteries".ELECTROCHIMICA ACTA 315(2019):58-66.