Details

Autor(en) / Beteiligte

• Qiu, Pengpeng
• Yao, Yu
• Li, Wei
• Sun, Yang
• Jiang, Zheng
• Mei, Bingbao
• Gu, Lin
• Zhang, Qinghua
• Shang, Tongtong
• Yu, Xiqian
• Yang, Jianping
• Fang, Yuan
• Zhu, Guihua
• Zhang, Ziling
• Zhu, Xiaohang
• Zhao, Tao
• Jiang, Wan
• Fan, Yuchi
• Wang, Lianjun
• Ma, Bin
• Liu, Liangliang
• Yu, Yan
• Luo, Wei

Titel

Sub-nanometric Manganous Oxide Clusters in Nitrogen Doped Mesoporous Carbon Nanosheets for High-Performance Lithium-Sulfur Batteries

Ist Teil von

• Nano letters, 2021-01, Vol.21 (1), p.700-708

Ort / Verlag

United States

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The greatest challenge for lithium-sulfur (Li-S) batteries application is the development of cathode hosts to address the low conductivity, huge volume change, and shuttling effect of sulfur or lithium polysulfides (LiPs). Herein, we demonstrate a composite host to circumvent these problems by confining sub-nanometric manganous oxide clusters (MOCs) in nitrogen doped mesoporous carbon nanosheets. The atomic structure of MOCs is well-characterized and optimized via the extended X-ray absorption fine structure analysis and density functional theory (DFT) calculations. Benefiting from the unique design, the assembled Li-S battery displays remarkable electrochemical performances including a high reversible capacity (990 mAh g after 100 cycles at 0.2 A g ) and a superior cycle life (60% retention over 250 cycles at 2 A g ). Both the experimental results and DFT calculations demonstrate that the well-dispersed MOCs could significantly promote the chemisorption of LiPs, thus greatly improving the capacity and rate performance.