Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (6): 1606-1613.doi: 10.19799/j.cnki.2095-4239.2020.0148

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Brief review of progress in lithium-sulfur batteries based on dissolution-deposition reactions

Mengdie YAN1(), Hui LI2(), Min LING2(), Huilin PAN1(), Qiang ZHANG3   

  1. 1.Department of Chemistry Zhejiang University
    2.College of Chemical and Biological Engineering, Hangzhou 310027, Zhejiang, China
    3.Department of Chemical Engineering, Tsinghua University, Beijing 100085, China
  • Received:2020-04-19 Revised:2020-05-14 Online:2020-11-05 Published:2020-10-28
  • Contact: Hui LI,Min LING,Huilin PAN E-mail:11937045@zju.edu.cn;minling@zju.edu.cn;panhuilin@zju.edu.cn

Abstract:

Lithium-sulfur (Li-S) batteries have attracted tremendous interest in the last decade because of the low cost of S and its high theoretical energy density. Extensive efforts have been devoted to designing advanced conductive cathode networks and functional electrolytes. The performances of Li-S batteries have been significantly improved. The working mechanisms have also been well understood. However, a huge gap still exists between the achievable energy density and their theoretical energy density and the limited cycle life for Li-S batteries under practical conditions, such as high S loading, low electrolyte usage, and low N/P ratio. Based on a brief review of the recent progress of Li-S batteries, we particularly discuss herein the obstacles of Li-S batteries under practical conditions, such as low S utilization, limited cycle life, lithium dendrite, and "dead Li." This review reveals the criticality of understanding and solving the reversible and sustainable reactions for S and Li metal under thick electrode, low electrolyte usage, and restricted N/P ratios for the future development of high-energy Li-S batteries. We conclude that a comprehensive solution that combines sulfur electrode architecture, electrolyte, and Li metal protection is important in enhancing the structural stability of Li and S electrodes and conducting networking to realize a high-energy Li-S battery technology and promote its commercialization.

Key words: lithium-sulfur batteries, high energy density, cycle life

CLC Number: