"High-Energy-Density Solid-Electrolyte-Based Liquid Li-S and Li-Se Batteries"

Yang Jin: Kai Liu, Jialiang Lang, Xin Jiang, Zhikun Zheng, Qinghe Su, Zeya Huang, Yuanzheng Long, Chang-an Wang, Hui Wu, and Yi Cui; Joule, 10/15/19.

Additional Authors: Kai Liu, Jialiang Lang, Xin Jiang, Zhikun Zheng, Qinghe Su, Zeya Huang, Yuanzheng Long, Chang-an Wang, Hui Wu, and Yi Cui

Abstract:

Lithium-sulfur (Li-S) and Lithium-selenium (Li-Se) batteries are considered aspromising candidates for next-generation battery technologies, as they havehigh energy density and low cost. However, due to the use of a solid Li-metalanode and a liquid organic electrolyte, the current Li-S and Li-Se batteriesface several issues in terms of Coulombicefficiency and cycling stability, whichseriously impeded their development. Here, we report solid-electrolyte-basedliquid Li-S and Li-Se (SELL-S and SELL-Se in short) batteries. The batteries useaLi6.4La3Zr1.4Ta0.6O12(LLZTO) ceramic tube as electrolyte and work at temper-atures higher than the melting point of Li; thus, polysulfide or polyselenide shut-tle effects and Li dendrite growth are effectively prevented, and high energydensity, together with high stability, fast charge/discharge capability, highCoulombic efficiency, and high energy efficiency, can be achieved. The SELL-Sand SELL-Se batteries provide broader platforms for constructing high-energy,high-power, long-lifetime, and low-cost energy storage.