DataVXACS Applied Materials & InterfacesPaper
journal article·2020-09-30

Rational Design and Mechanical Understanding of Three-Dimensional Macro-/Mesoporous Silicon Lithium-Ion Battery Anodes with a Tunable Pore Size and Wall Thickness

Xiuxia Zuo, Yi Wen, Yike Qiu, Ya-Jun Cheng, Shanshan Yin, Qing Ji, Zhong You, Jin Zhu, Peter Müller-Buschbaum, Lifeng Ma, Peter G. Bruce, Yonggao Xia

ACS Applied Materials & Interfaces· Volume 12· Issue 39
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Source abstract

Abstract

Silicon is regarded as one of the most promising next generation lithium-ion battery anodes due to its exceptional theoretical capacity, appropriate voltage profile, and vast abundance. Nevertheless, huge volume expansion and drastic stress generated upon lithiation cause poor cyclic stability. It has been one of the central issues to improve cyclic performance of silicon-based lithium-ion battery anodes. Constructing hierarchical macro-/mesoporous silicon with a tunable pore size and wall thickness is developed to tackle this issue. Rational structure design, controllable synthesis, and theoretical mechanical simulation are combined together to reveal fundamental mechanisms responsible for an improved cyclic performance. A self-templating strategy is applied using Stöber silica particles as a templating agent and precursor coupled with a magnesiothermic reduction process. Systematic variation of the magnesiothermic reduction time allows good control over the structures of the porous silicon. Finite element mechanical simulations on the porous silicon show that an increased pore size and a reduced wall thickness generate less mechanical stress in average along with an extended lithiation state. Besides the mechanical stress, the evolution of strain and displacement of the porous silicon is also elaborated with the finite element simulation.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

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

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

Affiliations

Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Rd, Ningbo 315201, Zhejiang Province, P.R. China

National Demonstration Center for Experimental Mechanics Education, School of Aerospace, Xi’an Jiaotong University, 28 Xianning West Rd, Xi’an 710049, Shaanxi Province, P.R. China

Department of Engineering Mechanics, Xi’an Jiaotong University, 28 Xianning West Rd, Xi’an 710049, Shaanxi Province, P.R. China

Department of Materials, University of Oxford, Parks Rd, OX1 3PH Oxford, U.K.

Physik Department, Lehrstuhl für Funtionelle Materielien, Technische Universität München, James-Franck-Strasse 1, 85748 Garching, Germany

The University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315100, Zhejiang Province, P.R. China

Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, U.K.

Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany

The Henry Royce Institute, Parks Road, Oxford OX1 3PH, U.K.

The Faraday Institution, Quad One, Becquerel Avenue, Harwell Campus, Didcot OX11 0RA, U.K.

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Rd, Shijingshan District, Beijing 100049, P.R. China

Funding

Engineering and Physical Sciences Research Council · Natural Science Foundation of Ningbo · European Commission · Deutsche Forschungsgemeinschaft · Horizon 2020 Framework Programme · China Scholarship Council · Natural Sciences and Engineering Research Council of Canada · National Natural Science Foundation of China · Chinese Academy of Sciences · Key Laboratory of Bio-based Polymeric Materials of Zhejiang Province · Henry Royce Institute for Advanced Materials · Faraday Institution · Zhejiang Province

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