材料科学
纳米纤维
电解质
复合数
结晶度
化学工程
电化学
锂(药物)
膜
静电纺丝
氟化物
电导率
电池(电)
锂离子电池
聚合物
复合材料
无机化学
电极
化学
物理
工程类
内分泌学
医学
物理化学
功率(物理)
量子力学
生物化学
作者
Shun Nakazawa,Yu Matsuda,Mitsuki Ochiai,Yuta Inafune,Masafumi Yamato,Manabu Tanaka,Hiroyoshi Kawakami
标识
DOI:10.1016/j.electacta.2021.139114
摘要
Solid polymer electrolytes (SPEs) have been actively studied for all-solid-state lithium ion batteries (ASS-LIBs). Here we show high-performance SPEs based on lithium salt-containing crystalline poly(vinylidene fluoride) (PVDF) nanofibers. It first reveals that the higher β-phase crystallinity of the PVDF nanofibers gives composite SPEs with the higher ion conductivity (σ = 6.0 × 10−4 S cm−1 at 60°C) and the higher lithium ion transference number (tLi+ = 0.58 at 60°C). The PVDF nanofiber composite SPEs possess good electrochemical stability and mechanical durability as investigated in the galvano static constant current cycling tests (Li | PVDF/Li-16 Nf composite membrane | Li). The ASS-LIB composed of the PVDF nanofiber composite SPEs (Li | PVDF/Li-16 Nf composite membrane | LiFePO4) show outstanding rate capability and charge-discharge cycling behavior. Finally, multi-layered stacked batteries are fabricated to produce quintuple cell potentials of 17.0 V, promising future batteries that achieve high-voltage operation and high energy densities.
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