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Long-life lithium-sulfur batteries with high areal capacity based on coaxial CNTs@TiN-TiO2 sponge

Engineering and Technology

Long-life lithium-sulfur batteries with high areal capacity based on coaxial CNTs@TiN-TiO2 sponge

H. Zhang, L. K. Ono, et al.

This groundbreaking research by Hui Zhang, Luis K. Ono, Guoqing Tong, Yuqiang Liu, and Yabing Qi presents the development of a coaxial CNTs@TiN-TiO2 sponge as an advanced catalyst for lithium-sulfur batteries, showcasing remarkable capacity retention and efficiency in lithium polysulfide conversion.

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Playback language: English
Abstract
This work demonstrates the fabrication of a coaxial CNTs@TiN-TiO2 sponge using atomic layer deposition (ALD) to create a heterostructure catalyst for lithium polysulfide conversion in lithium-sulfur batteries. Optimization of TiO2 and TiN layer thicknesses and annealing resulted in a high specific capacity of 1289 mAh g⁻¹ at 1C and 85% capacity retention after 500 cycles at 2C. The porous structure also enabled a high areal capacity of 21.5 mAh cm⁻².
Publisher
Nature Communications
Published On
Aug 06, 2021
Authors
Hui Zhang, Luis K. Ono, Guoqing Tong, Yuqiang Liu, Yabing Qi
Tags
lithium-sulfur batteries
CNTs@TiN-TiO2 sponge
catalyst
polysulfide conversion
capacity retention
atomic layer deposition
heterostructure

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