A Shuttle-Free Solid-State Cu−Li Battery Based on a Sandwich-Structured Electrolyte

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Huimin Wang
  • Changhong Wang
  • Matthew Zheng
  • Jianneng Liang
  • Ming Yang
  • And 5 others
  • Xingyu Feng
  • Xiangzhong Ren
  • Denis Y. W. Yu
  • Yongliang Li
  • Xueliang Sun

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article numbere202214117
Journal / PublicationAngewandte Chemie (International Edition)
Volume62
Issue number3
Online published14 Nov 2022
Publication statusPublished - 16 Jan 2023

Abstract

Cu−Li batteries leveraging the two-electron redox property of Cu can offer high energy density and low cost. However, Cu−Li batteries are plagued by limited solubility and a shuttle effect of Cu ions in traditional electrolytes, which leads to low energy density and poor cycling stability. In this work, we rationally design a solid-state sandwich electrolyte for solid-state Cu−Li batteries, in which a deep-eutectic-solvent gel with high Cu-ion solubility is devised as a Cu-ion reservoir while a ceramic Li1.4Al0.4Ti1.6(PO4)3 interlayer is used to block Cu-ion crossover. Because of the high ionic conductivity (0.55 mS cm−1 at 25 °C), wide electrochemical window (>4.5 V vs. Li+/Li), and high Cu ion solubility of solid-state sandwich electrolyte, a solid-state Cu−Li battery demonstrates a high energy density of 1 485 Wh kgCu−1and long-term cyclability with 97 % capacity retention over 120 cycles. The present study lays the groundwork for future research into low-cost solid-state Cu−Li batteries.

Research Area(s)

  • Cu−Li Batteries, Deep Eutectic Solvent, Metal Cathodes, Sandwich Electrolyte, Solid-State Batteries

Citation Format(s)

A Shuttle-Free Solid-State Cu−Li Battery Based on a Sandwich-Structured Electrolyte. / Wang, Huimin; Wang, Changhong; Zheng, Matthew et al.
In: Angewandte Chemie (International Edition), Vol. 62, No. 3, e202214117, 16.01.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review