Origami Silicon Anodes: Geometric Design for Structural Elasticity and Connectivity
Abstract
Abstract Achieving stable cycling of high‐capacity battery electrodes with large volume changes remains a significant challenge, with their mechanical failure and sluggish kinetics, primarily due to inadequate structural accommodation and inefficient transport pathways. Here, a magnesiothermic crystallization approach is presented to construct origami capsule (OC) architectures, imparting flexibility and conformability to inherently brittle silicon, featuring highly interconnected 2D silicon nanosheets (2.5 nm thickness) with built‐in nanopores encapsulated within a pressure‐tolerant conformal microshell. The design leverages geometric features at both the nanoscale (within nanosheets) and microscale (capsule assembly) to impart structural elasticity and connectivity for efficient stress dissipation, enhancing mechanical integrity and rapid transport kinetics. Consequently, the OC anode exhibits low electrode swelling (14.7%) at 2945 mAh g −1 and exceptional rate capability, delivering a high capacity and ≈100% retention after 470 cycles at a large current density of 6 A g −1 . This work bridges geometric design and materials science, opening new avenues for high‐performance energy storage solutions.
Article Details
Authors (16)
Haimei Li
Department of Psychiatry, the First Affiliated Hospital, Zhejiang University School of Medicine, The Key Laboratory of Mental Disorder Management in Zhejiang Province
Ziyun Zhao
Mengwei Sun
Interdisciplinary Research Center for Sustainable Energy Science and Engineering (IRC4SE2) School of Chemical Engineering Zhengzhou University Zhengzhou 450001 China
Nannan Kuang
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 and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
Yingxin Liu
Yong Guo
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, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
Yibo Zhang
Fanqi Chen
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 and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
Qinyi Zhan
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 and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
Anni Liu
Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage State Key Laboratory of Chemical Engineering and Low‐Carbon Technology School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P.R. China
Yue Zhai
Qing He
Yunpei Yue
Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300072 China
Yun Tian
Interdisciplinary Research Center for Sustainable Energy Science and Engineering, School of Chemical Engineering
Shichao Wu
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, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
Quan‐hong Yang
Nanoyang Group, Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage, School of Chemical Engineering and Technology, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300072 China