锂离子电池用碳纳米管导电剂产业化应用研究进展OA

Carbon nanotubes(CNTs)are one-dimensional nanomaterials composed of sp2-hybridized carbon atoms and exhibit exceptional intrinsic electrical conductivity and mechanical properties.Within lithium-ion battery(LIB)electrodes,CNTs form highly efficient three-dimensional conductive networks through a synergistic line-contact-to-bridging mechanism,thereby significantly enhancing energy density,rate capability,and cycling stability.As a result,CNTs have emerged as critical materials for high-energy-density battery systems.Although multi-walled CNTs(MWCNTs)combined with carbon black have been widely adopted in high-performance LIBs,the industrialization of single-walled CNTs(SWCNTs)remains challenging because of immature large-scale production technologies,complex dispersion processes,and high overall costs.This review systematically examines recent advances in the industrial application of CNT-based conductive agents.It elucidates the microscopic mechanisms by which CNTs enable long-range electron transport,stabilize electrode-electrolyte interfaces,and mitigate electrode volume strain.In addition,strategies for scalable CNT synthesis using fluidized-bed chemical vapor deposition(CVD)are analyzed,together with performance optimization approaches involving purification,surface functionalization(such as carboxylation and N or B doping),and drying processes.The compatibility of CNTs with diverse electrode systems,including lithium iron phosphate cathodes,high-nickel ternary cathodes,silicon-based anodes,and all-solid-state batteries,is critically assessed,and practical selection guidelines are proposed based on performance requirements,cost considerations,and application scenarios.Comprehensive analysis indicates that future progress will depend on three key directions:integration of cross-scale manufacturing technologies,such as inverse catalyst design and artificial intelligence-assisted process control;development of environmentally friendly and low-cost dispersion methods,including bio-based dispersants and adaptation for dry electrode processing;and resolution of the engineering bottlenecks associated with SWCNTs,particularly cost reduction through multimetal synergistic catalysis.These advances are expected to drive the transition of CNTs from auxiliary conductive additives to multifunctional core components,providing essential material support and theoretical guidance for next-generation high-energy-density and high-safety energy storage systems.