首页|From OD to 3D:Hierarchical structured high-performance free-standing silicon anodes based on binder-induced topological network architecture

From OD to 3D:Hierarchical structured high-performance free-standing silicon anodes based on binder-induced topological network architecture

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Free-standing silicon anodes with high proportion of active materials have aroused great attention;how-ever,the mechanical stability and electrochemical performance are severely suppressed.Herein,to resolve the appeal issues,a free-standing anode with a"corrugated paper"shape on micro-scale and a topological crosslinking network on the submicron and nano-scale is designed.Essentially,an integrated three-dimensional electrode structure is constructed based on robust carbon nanotubes network with firmly anchored SiNPs via forming interlocking junctions.In which,the hierarchical interlocking structure is achieved by directional induction of the binder,which ensures well integration during cycling so that significantly enhances mechanical stability as well as electronic and ionic conductivity of electrodes.Benefiting from it,this anode exhibits outstanding performance under harsh service conditions including high Si loading,ultrahigh areal capacity(33.2 mA h cm-2),and high/low temperatures(-15-60 ℃),which significantly extends its practical prospect.Furthermore,the optimization mechanism of this elec-trode is explored to verify the crack-healing and structure-integration maintaining along cycling via a unique self-stabilization process.Thus,from both the fundamental and engineering views,this strategy offers a promising path to produce high-performance free-standing electrodes for flexible device applica-tions especially facing volume effect challenges.

Topological networkSelf-stabilizationFlexibilityFree-standingSilicon anode

Yihong Tong、Ruicheng Cao、Guanghui Xu、Yifeng Xia、Hongyuan Xu、Hong Jin、Hui Xu

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Xi'an Jiaotong University Suzhou Academy,Suzhou 215123,Jiangsu,China

Nano Science and Technology Institute,University of Science and Technology of China,Suzhou 215123,Jiangsu,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaSuzhou Technological innovation of key industriesresearch and development of key technologies

2190522121805221SGC2021118

2024

10.1016/j.jechem.2024.01.067

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
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