High-safety all-solid-state lithium-ion battery working at ambient temperature with in situ UV-curing polymer electrolyte on the Electrode
High-safety all-solid-state lithium-ion battery working at ambient temperature with in situ UV-curing polymer electrolyte on the Electrode
复制标题
常温工作的高安全性全固态锂离子电池，电极上采用原位紫外固化聚合物电解质
DOI：
10.1002/celc.202000411
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发表时间：
2020
期刊：
影响因子：
4
通讯作者：
Wang Rui
中科院分区：
文献类型：
--
作者：
Yang Zhuang;Luo Yingwu;Gao Xiang;Wang Rui
The development of wearable electronic devices prompts the demand for high‐safety all‐solid‐state lithium‐ion batteries (ASSLIBs), which can work at ambient temperature with comparable performance to traditional commercial lithium‐ion batteries. In this work, a three‐dimensional network design to overcome the contradiction between ionic conductivity and mechanical strength in polymer electrolytes is proposed. The designed solid polymer electrolyte (SPE) has the ion‐conducting group (oligomeric ethylene oxide) fixed on the side chains, whereas the main chain is crosslinked polyacrylate, providing good mechanical strength. Succinonitrile (SN) is uniformly dispersed in the cross‐linked network as an additive. The prepared SN−SPE shows a high ionic conductivity of 4.6×10−4S cm−1at 25 °C with a Li+‐ion transference number of 0.45 and an excellent electrochemical stability window up to 4.6 V (vs. Li+/Li). The preparation method allows that the electrolyte can be UV‐cured in situ on the cathode to achieve a cathode‐electrolyte integrated electrode, which enhances the interface contact and decreases the interface resistance. As‐fabricated LiFePO4//Li4Ti5O12cathode‐electrolyte integrated ASSLIBs can deliver a discharge capacity of 155.88 mAh g−1at 0.2 C at room temperature and a capacity retention up to 93.62 % after 100 charge‐discharge cycles. The reported polymer electrolyte and advanced assembly process provided a promising strategy for the wearable ASSLIBs.
