实现2D抗的结构和电化学稳定性,用于用非易燃电解质储存离子
Xiaoqiong Du1,2, Xuyun Guo1,2, Brais González-Tobío3
1CRANN and AMBER research centers, Trinity College Dublin, Dublin 2, Dublin, Ireland.
ACS nano
|November 14, 2025
概括
具有非易燃电解质的二维反烯阳极提供稳定的离子储存. 这一突破解决了合金类型阳极的挑战,使高性能和安全的可充电电池成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 合金类型的阳极对充电电池来说是有前途的,因为其容量大,潜力低.
- 挑战包括体积膨胀的材料粉碎和不稳定的固体电解质介相 (SEI).
- 传统的电解质有助于SEI的不稳定性和材料降解.
研究的目的:
- 为离子电池 (PIB) 开发一种稳定的阳极材料.
- 为了研究使用二维反烯与非易燃电解质的使用.
- 提高PIBs的结构和电化学稳定性.
主要方法:
- 使用二维反为阳极材料.
- 使用的非易燃的1M三甲基酸盐 (TEP) 和三2,2,2-三甲基酸盐 (TFP) 基电解质.
- 分析了反烯阳极的形态,结构完整性和电化学性能.
主要成果:
- 2D抗素表现出纹形态,在循环过程中保持结构完整性.
- 基于TEP的电解质形成了稳定的离子衍生的SEI,而基于TFP的电解质产生了富含KF的SEI.
- 在TEP/TFP电解质中实现了486.8/492.6 mAh g-1的稳定容量,在200个周期以上具有高保留率.
- 证明了长期稳定性 (312.3 mAh g-1 在TEP中在0.5 A g-1 时超过400个周期).
- 在-20°C至50°C的温度下,成功地进行了全细胞演示.
结论:
- 与非易燃电解质相结合的2D抗为PIBs提供了稳定和高性能阳极.
- 纹形态和稳定的SEI形成是适应体积变化和防止降解的关键.
- 这一进步为可充电电池应用中安全高效的合金类阳极铺平了道路.
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