Ionic shield for polysulfides towards highly-stable lithium–sulfur batteries

Jia-Qi Huang, Qiang Zhang, Hong-Jie Peng, Xin-Yan Liu, Wei-Zhong Qian, Fei Wei
  • Energy & Environmental Science, January 2014, Royal Society of Chemistry
  • DOI: 10.1039/c3ee42223b

Ionic Shield for Polysulfides toward High-Stable Lithium Sulfur Battery

What is it about?

A polysulfide shield is built by an ion selective membrane, which improves the stability and coulombic efficiency of Li–S cells.

Why is it important?

An ion selective membrane was proposed to block the diffusion of polysulfide anions across the membrane to the anode side, which greatly suppresses the so called "shuttle effect" in the lithium sulfur battery. By this method, an ultralow capacity degradation rate of 0.08%per cycle is achieved within the first 500 galvanostatic charge–discharge cycles.

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