journal article·2021-08-18

Incorporating Cobalt Nanoparticles in Nitrogen-Doped Mesoporous Carbon Spheres through Composite Micelle Assembly for High-Performance Lithium–Sulfur Batteries

Yuan Fang, Yu Yao, Haoyu Yang, Yuchi Fan, Naoyuki Nomura, Weiwei Zhou, Dewei Ni, Xiaopeng Li, Wan Jiang, Pengpeng Qiu, Wei Luo

ACS Applied Materials & Interfaces· Volume 13· Issue 32
Publisher page

Abstract

Lithium–sulfur (Li–S) batteries have exhibited tremendous potential among the various secondary batteries benefitting from their large energy density, low expense, and enhanced security. However, the commercial use for Li–S batteries is immensely limited by the insulation of S, noticeable volume expansion from S to Li2S2/Li2S, and the undesired shuttle effect of lithium polysulfides (LiPs). Herein, a composite sulfur host has been prepared by in situ incorporations of cobalt nanoparticles (NPs) into nitrogen-doped mesoporous carbon spheres (Co/N-PCSs) through the composite micelle assembly strategy. The resultant functional Co/N-PCSs not only possess uniform spherical morphology with large open mesopores, high surface area, and pore volume but also have small Co NPs homogeneously inlaid into the pore walls of carbon frameworks. Both the experimental and theoretical calculation results demonstrate that the formed cobalt NPs can efficiently accelerate the lithium-ion diffusion reaction and greatly entrap the soluble intermediate LiPs. Benefiting from the well-designed structure, the Co/N-PCSs@S cathode with a S loading of 73.82 wt % delivers superior electrochemical performance, including long cycling stability (60% for the residual capacity at 1 A g–1 within 300 cycles) and excellent rate performance (∼512 mAh g–1 at 6 A g–1). This design strategy of implanting metal NPs in mesoporous carbon can be inspiring in energy storage applications.
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Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Supercapacitor Materials and Fabrication

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

Affiliations

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China

Hefei National Laboratory for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, Anhui 230026, China

School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia

Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan

State Key Laboratory of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Funding

Natural Science Foundation of Shanghai · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · Key Basic Research Program of Science and Technology Commission of Shanghai Municipality · Shanghai Scientific and Technological Innovation Project · Innovation Program of Shanghai Municipal Education Commission · Shanghai Sailing

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