Compactly Coupled Nitrogen-Doped Carbon Nanosheets/Molybdenum Phosphide Nanocrystal Hollow Nanospheres as Polysulfide Reservoirs for High-Performance Lithium-Sulfur Chemistry

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Zhonghui SunLi Niu

Abstract

Lithium-sulfur (Li-S) batteries have been disclosed as one of the most promising energy storage systems. However, the low utilization of sulfur, the detrimental shuttling behavior of polysulfides, and the sluggish kinetics in electrochemical processes, severely impede their application. Herein, 3D hierarchical nitrogen-doped carbon nanosheets/molybdenum phosphide nanocrystal hollow nanospheres (MoP@C/N HCSs) are introduced to Li-S batteries via decorating commercial separators to inhibit polysulfides diffusion. It acts not only as a polysulfides immobilizer to provide strong physical trapping and chemical anchoring toward polysulfides, but also as an electrocatalyst to accelerate the kinetics of the polysulfides redox reaction, and to lower the Li2 S nucleation/dissolution interfacial energy barrier and self-discharge capacity loss in working Li-S batteries, simultaneously. As a result, the Li-S batteries with MoP@C/N HCS-modified separators show superior rate capability (920 mAh g-1 at 2 C) and stable cycling life with only 0.04% capacity decay per cycle over 500 cycles at 1 C with nearly 100% Coulombic efficiency. Furthermore, the Li-S battery can achieve a high area capacity of 5.1 mAh cm-2 with satisfied capacity retention ...Continue Reading

References

Feb 18, 2015·Advanced Materials·Arumugam ManthiramChenxi Zu
May 28, 2016·Advanced Materials·Zhiming CuiJohn B Goodenough
Jul 26, 2017·Advanced Materials·Chunpeng YangLiangbing Hu
Jan 9, 2018·Journal of the American Chemical Society·Yiren ZhongHailiang Wang
Jun 23, 2018·ACS Applied Materials & Interfaces·Pauline HanArumugam Manthiram
Sep 27, 2018·Angewandte Chemie·Yuxiang YangHailiang Wang

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Citations

Mar 12, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Eunho ChaWonbong Choi
Nov 3, 2020·Chemical Communications : Chem Comm·Benben WeiGuofu Zhou
Mar 23, 2021·Research : a Science Partner Journal·Henghan DaiWei Huang
May 19, 2021·Chemical Society Reviews·Shao-Hai LiYi-Jun Xu
Aug 20, 2021·ACS Applied Materials & Interfaces·Haikuo ZhangJinjin Li

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