A Shuttle-Free Solid-State Cu−Li Battery Based on a Sandwich-Structured Electrolyte
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | e202214117 |
Journal / Publication | Angewandte Chemie (International Edition) |
Volume | 62 |
Issue number | 3 |
Online published | 14 Nov 2022 |
Publication status | Published - 16 Jan 2023 |
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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.
In: Angewandte Chemie (International Edition), Vol. 62, No. 3, e202214117, 16.01.2023.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review