title: Comprehensive Understanding of High Polar Polyacrylonitrile as an Effective Binder for Li-Ion Battery Nano-Si Anodes.
abstract: Well-defined polyacrylonitriles (PANs) with different molecular weights were synthesized through an activator regenerated by electron-transfer atom-transfer radical polymerization method and employed as binders in silicon negative electrode for lithium-ion batteries. Compared with poly(vinylidene fluoride) and carboxyl methyl cellulose as binders, the electrode performance of PANs is well-improved. Specifically, at 100 mA g(-1) from 0.01 to 1.5 V, the initial discharge capacity of PAN100-based electrode is 4147.8 mA h g(-1) and still remains about 1639.6 mA h g(-1) over 50 cycles. A comprehensive understanding on the improvement mechanism is preliminarily discussed. The results indicate that the superior performance largely depends on the higher lithium ion diffusion efficiency in PAN which results from the weak interaction between lithium ions and PAN polymer chain, and the hydrogen bonds among the nitrile group (C≡N) of PAN, Si nanoparticles, and the current collector, which will lead to an efficient coating of PAN with the Si particles and well-improved adhesion strength, synergistically depressing the structural deterioration of silicon electrodes.
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Luo
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Helmholtz Institute Ulm, Helmholtzstrasse 11, D-89081 Ulm, Germany.|Karlsruhe Institute of Technology, P.O. Box 3640, D-76021 Karlsruhe, Germany.
authors.forename: Huang
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Xiaona
authors.initials: X
authors.lastname: Han
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Hui
authors.initials: H
authors.lastname: Dong
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Xing
authors.initials: X
authors.lastname: Xu
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Chao
authors.initials: C
authors.lastname: Chen
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P.R. China.
authors.forename: Jiahao
authors.initials: J
authors.lastname: Lin
keywords: Li-ion battery; anode; binder; nano-Si; polyacrylonitrile