journal article·2024-06

Catalytic Solid‐State Sulfur Conversion Confined in Micropores toward Superhigh Coulombic Efficiency Lithium‐Sulfur Batteries

Haotian Yang, Li Wang, Chuannan Geng, Yufei Zhao, Qiang Li, Xin Jiang, Zhangliu Tian, Meng Wang, Chonglai Jiang, Zejun Sun, Baihua Cui, Yan‐Bing He, Wei Chen, Wei Lv, Quan‐Hong Yang

Advanced Energy Materials· Volume 14· Issue 21
Publisher page

Abstract

Abstract Achieving the solid–solid conversion of sulfur is a fundamental solution to eliminating the shuttling of soluble polysulfides and improving the cycling stability of lithium‐sulfur batteries. However, the sluggish solid reaction kinetics seriously challenge the battery performance. In this work, a micropore‐confined catalysis strategy to achieve the smooth solid–solid conversion of sulfur is proposed. It is realized by storing sulfur in a microporous carbon host with narrow pore size and uniformly distributed single‐atom Co catalytic sites. The microporous structure avoids the contact of electrolyte solvents with the inner sulfur, preventing the formation and dissolution of polysulfides and efficiently suppressing sulfur loss during cycling. The introduced single‐atom Co catalytic sites promote the charge transfer to accelerate the solid–solid conversion of sulfur. When coupled with a liquid carbonate electrolyte, the battery exhibits a remarkably high Coulombic efficiency (CE) of ≈99.88% and a minimal capacity decay rate of ≈0.016% per cycle for 1000 cycles at 0.5 C. Even when coupled with the solid‐state electrolyte, the battery still delivers a significantly high capacity of 1100 mAh g−1 and a remarkably high CE of ≈99.83% over 200 cycles. This work reveals a promising solution for developing practical stable Li─S batteries.
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Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 China

Shenzhen Geim Graphene Center Engineering Laboratory for Functionalized Carbon Materials Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China

Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology National Industry‐Education Integration Platform of Energy Storage Tianjin University Tianjin 300072 China

Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore

Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 China

Department of Physics National University of Singapore 2 Science Drive 3 Singapore 117542 Singapore

Funding

National Basic Research Program of China · National Natural Science Foundation of China · China Postdoctoral Science Foundation · Fundamental Research Funds for the Central Universities · Basic and Applied Basic Research Foundation of Guangdong Province · Shenzhen Science and Technology Innovation Program

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