July 6, 2024
New Publication in ACS Nano
![ACS Nano Publication](../images/acsnano.png)
We are excited to announce our latest publication in ACS Nano, which presents significant advancements in the development of high-voltage all-solid-state lithium batteries through the innovative use of high-valent-element-doped halide electrolytes.
Research Highlights
- Development of novel high-valent-element-doped halide electrolytes for all-solid-state lithium batteries
- Achievement of exceptional long-term cycling stability at high voltages
- Demonstration of practical applications with high-voltage cathode materials
- Comprehensive understanding of the doping effects on electrochemical performance
We reported a series of high-valent lithium chloride compounds with high ionic conductivity. The Li2.6In0.8Ta0.2Cl6 exhibited superionic conductivity of up to 4.47 mS cm-1 at 30 °C, a low activation energy barrier, and an expanded onset of electrochemical oxidation. AIMD simulation demonstrated the intrinsic high ion conductivity of the LInTaCl system. By analyzing the probability density of Li+, the increase of cation vacancies in the doped LInCl lattice enhanced the percolation of lithium ions. The comprehensive characterization techniques have confirmed the presence of a stable interface between the cathode active materials and SSEs, thereby validating the high oxidation stability and chemical compatibility of LInTaCl with oxide cathode materials. Thus, ASSBs exhibited exceptional cycling stability, maintaining 70% capacity retention even at high current densities and high rates, specifically at a 4 C rate with an active material loading of 7.52 mg cm-2, for over 1450 cycles. Significantly, future advancements are expected to prioritize these concepts into high-voltage ASSBs, aiming to meet the increasing energy density demand for next-generation 5 V batteries.
Title: High-voltage long-cycling all-solid-state lithium batteries with high-valent-element-doped halide electrolytes
Journal: ACS Nano