Carbon Nanotube/Hygroscopic Salt Nanocomposites with Dual-Functionality of Effective Cooling and Fire Resistance for Safe and Ultrahigh-Rate Operation of Practical Lithium-Ion Batteries

Longyuan Zhang; Wei Yu; Junming WangDan GaoYucheng ChenWenhua DaiPeng WangGuoxian LiChuizhou MengChanghong LiuShijie Guo

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Carbon Nanotube/Hygroscopic Salt Nanocomposites with Dual-Functionality of Effective Cooling and Fire Resistance for Safe and Ultrahigh-Rate Operation of Practical Lithium-Ion Batteries

机译：Carbon Nanotube/Hygroscopic Salt Nanocomposites with Dual-Functionality of Effective Cooling and Fire Resistance for Safe and Ultrahigh-Rate Operation of Practical Lithium-Ion Batteries

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Fire and explosion accidents and reduced energy utilization due to poorcycling stability of lithium-ion batteries (LIBs) caused by inevitable internaltemperature rise during high-rate operations have become a growing concern.Herein, a dual-functional carbon nanotube/hygroscopic salt (DFCNT/HS) film with effective passive cooling performance and fire insulation forthe safe usage of practical LIBs under extremely fast discharging conditionsis reported. The DFCNT/HS film based on the cooling mechanism ofself-adaptive moisture absorption/desorption delivers a high cooling powerof 32.9 W m~(?2) K~(?1), which can reduce the maximum temperature of a 18650–3.6 V/2.0 Ah LIB by 11.2 and 17.4 ℃ at discharging rates of 10 and 15 C,respectively. Covering the cooling film, the battery discharges 23.6 Ah moretotal capacity at 10 within 500 cycles. What is challenging, almost three-foldextended lifetime of 425 cycles is achieved at 15 C with an extra total capacityof 467.2 Ah. Meanwhile, the developed film also shows an excellent hightemperatureresistance up to 540 ℃, which can alleviate the devastating firepropagation. The fast heat dissipation and excellent fire insulation as well asthe mechanical flexibility and manufacturing scalability make this new materialpromising for safe usage of high-rate LIBs with zero energy consumption.

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来源
《Advanced functional materials》 |2023年第18期|2213846.1-2213846.11|共11页
作者
Longyuan Zhang; Wei Yu; Junming WangDan GaoYucheng ChenWenhua DaiPeng WangGuoxian LiChuizhou MengChanghong LiuShijie Guo;
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作者单位

State Key Laboratory for Reliability and Intelligence of ElectricalEquipmentHebei Key Laboratory of Robot Perception and Human-Robot InteractionSchool of Mechanical EngineeringHebei University of TechnologyTianjin 300401, China;

National Institute of Clean-and-Low-Carbon EnergyBeijing 102211, China;

Department of Mathematics and ScienceFujian Jiangxia UniversityFuzhou 350108, ChinaTsinghua-Foxconn Nanotechnology Research Center and Departmentof PhysicsTsinghua UniversityBeijing 100084, China;

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正文语种英语
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battery safety; carbon nanotubes; high-rate capability; lithium-ion batteries; thermal management;

Carbon Nanotube/Hygroscopic Salt Nanocomposites with Dual-Functionality of Effective Cooling and Fire Resistance for Safe and Ultrahigh-Rate Operation of Practical Lithium-Ion Batteries

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