Work

XO (X = Ti, Mn) decorated hollow multi-channel carbon sub-micro fiber networks as freestanding cathode for Li S batteries

Year: 2022

Type: article

Abstract: Lithium-sulfur (LiS) batteries are considered as one of the most promising high-energy storage devices due to the high theoretical capacity (1675 mA·h·g−1) and large energy density (2600 W·h·kg−1). However, the poor conductivity of sulfur and “shuttle effect” of soluble polysulfide intermediates limit practical applications of LiS batteries. Herein, four kinds of carbon sub-micro fibers with different structures were designed and prepared, the effect of structure on LiS battery was studied. On this basis, the XO (X = Ti, Mn) decorated hollow multi-channel carbon sub-micro carbon fibers (HMCMFs) were prepared by electrospinning and carbonization. The HMCMFs can not only supply nanopores for relieving the expansion of sulfur but also served as high conductivity freestanding substrate for sulfur loading, meanwhile the decorated XO (X = Ti, Mn) can provide powerful chemical adsorption to polysulfide intermediates and limit “shuttle effect” Therefore, the TiO-HMCMFs/S composite shows high specific capacity of 900 mA·h·g−1 and maintain stable specific capacities up to ∼600 mA·h·g−1 over 300 cycles at 0.1 A·g−1. This work offers a facile method to build efficient sulfur cathode to acquire LiS batteries with high performance.

Source: Journal of Materiomics

DOI: 10.1016/j.jmat.2022.07.003

Authors: Qianqian Wu, Tianbao Yan, Kunming Li, Xuepeng Ni, Fanlong Zeng, Anqi Ju

Institutions: Donghua University, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,750