journal article·2024-10-08

Roller-like Spore Carbon Sphere-Orientated Graphene Fibers Prepared via Rheological Engineering for Lithium Sulfur Batteries

By Chunxiang Xian, Shenghui Shen, Tianqi Yang, Zhong Qiu, Yongqi Zhang, Feng Cao, Xinqi Liang, Minghua Chen, Xinping He, Yang Xia, Chen Wang, Wangjun Wan, Wenkui Zhang, Xinhui Xia, Jiangping Tu, Jiancang Zhou

ACS Nano· Volume 18· Issue 40
Publisher page

Abstract

Flexible batteries with large energy densities, lightweight nature, and high mechanical strength are considered as an eager goal for portable electronics. Herein, we first propose free-standing graphene fiber electrodes containing roller-like orientated spore carbon spheres via rheological engineering. With the help of the orientated microfluidic cospinning technology and the plasma reduction method, spore carbon spheres are self-assembled and orientedly dispersed into numerous graphene flakes, forming graphene fiber electrodes enriched with internal rolling woven structures, which cannot only enhance the electrical contact between active materials but also effectively improve the mechanical strength and structure stability of graphene fiber electrodes. When the designed graphene fibers are combined with the active sulfur cathode and lithium metal anode, the assembled flexible lithium sulfur batteries possess superior electrochemical performance with high capacity (>1000 mA h g –1 ) and excellent cycling life as well as good mechanical properties. According to density functional theory and COMSOL simulations, the roller-like spore carbon sphere-orientated graphene fiber hosts provide reinforced trapping-catalytic-conversion behavior to soluble polysulfides and nucleation active sites to lithium metal, thus synergistically suppressing the shuttle effect of polysulfides at the cathode side and lithium dendrite growth at the anode side, thereby boosting the whole electrochemical properties of lithium sulfur batteries.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Graphene and Nanomaterials Applications · Carbon Nanotubes in Composites · biodegradable polymer synthesis and properties

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

Affiliations

Department of Critical Care Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University Hangzhou 310016, China

School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, China

School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu 611371, China

Department of Engineering Technology, Huzhou College, Huzhou 313000, P. R. China

Key Laboratory of Engineering Dielectric and Applications (Ministry of Education), School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, P. R. China

Zhejiang Academy of Science and Technology for Inspection & Quarantine, Zhejiang, Hangzhou 311215, P. R. China

Funding

Science and Technology Department of Zhejiang Province · Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology), Ministry of Education · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · Key Research and Development Program of Sichuan Province · Zhejiang Provincial Postdoctoral Research Project

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