期刊
ADVANCED ENERGY MATERIALS
卷 8, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201702314
关键词
conducting polymers; ion conductivity; large capacity; lithium-ion batteries; Si anodes
类别
资金
- National Natural Science Foundation of China [21474035, 51403071, 51572100]
- Fundamental Research Funds for the Central Universities, HUST [2016JCTD111]
- Natural Science Foundation of Hubei Province [2015CFA116]
- Postdoctoral Science Foundation of China [2016M602289]
- City University of Hong Kong Applied Research [9667122, 9667144]
- Nanodevices and Characterization Centre of WNLO-HUST
- Analytical and Testing Center of HUST
- Recruitment Program of Global Youth Experts
Polymer binders with high ion and electron conductivities are prepared by assembling ionic polymers (polyethylene oxide and polyethylenimine) onto the electrically conducting polymer poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) chains. Crosslinking, chemical reductions, and electrostatics increase the modulus of the binders and maintain the integrity of the anode. The polymer binder shows lithium-ion diffusivity and electron conductivity that are 14 and 90 times higher than those of the widely used carboxymethyl cellulose (with acetylene black) binder, respectively. The silicon anode with the polymer binder has a high reversible capacity of over 2000 mA h g(-1) after 500 cycles at a current density of 1.0 A g(-1) and maintains a superior capacity of 1500 mA h g(-1) at a high current density of 8.0 A g(-1).
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