Self-Protecting Aqueous Lithium-Ion Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yuewang Yang
  • Zhaowen Bai
  • Sijing Liu
  • Yinggang Zhu
  • Jiongzhi Zheng
  • Baoling Huang

Detail(s)

Original languageEnglish
Article number2203035
Journal / PublicationSmall
Volume18
Issue number38
Online published21 Aug 2022
Publication statusPublished - 22 Sep 2022
Externally publishedYes

Abstract

Capacity degradation and destructive hazards are two major challenges for the operation of lithium-ion batteries at high temperatures. Although adding flame retardants or fire extinguishing agents can provide one-off self-protection in case of emergency overheating, it is desirable to directly regulate battery operation according to the temperature. Herein, smart self-protecting aqueous lithium-ion batteries are developed using thermos-responsive separators prepared through in situ polymerization on the hydrophilic separator. The thermos-responsive separator blocks the lithium ion transport channels at high temperature and reopens when the battery cools down; more importantly, this transition is reversible. The influence of lithium salts on the thermos-responsive behaviors of the hydrogels is investigated. Then suitable lithium salt (LiNO3) and concentration (1 m) are selected in the electrolyte to achieve self-protection without sacrificing battery performance. The shut-off temperature can be tuned from 30 to 80 °C by adjusting the hydrophilic and hydrophobic moiety ratio in the hydrogel for targeted applications. This self-protecting LiMn2O4/carbon coated LiTi2(PO4)3 (LMO/C-LTP) battery shows promise for smart energy storage devices with high safety and extended lifespan in case of high operating temperatures.

Research Area(s)

  • aqueous lithium-ion batteries, smart batteries, thermos-responsive hydrogels, thermos-responsive separators

Citation Format(s)

Self-Protecting Aqueous Lithium-Ion Batteries. / Yang, Yuewang; Bai, Zhaowen; Liu, Sijing; Zhu, Yinggang; Zheng, Jiongzhi; Chen, Guohua; Huang, Baoling.

In: Small, Vol. 18, No. 38, 2203035, 22.09.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review