首页|Hydrogen-bonded organic framework modified separator for simultaneously enhancing the safety and electrochemical performance of Ni-rich lithium-ion battery

Hydrogen-bonded organic framework modified separator for simultaneously enhancing the safety and electrochemical performance of Ni-rich lithium-ion battery

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Nickel-rich layered oxide cathode(LiNixCoyMn1-x-yO2,x＞0.5,NCM)shows substantial potential for applications in longer-range electrical vehicles.However,the rapid capacity decay and serious safety con-cerns impede its practical viability.This work provides a hydrogen-bonded organic framework(HOF)modification strategy to simultaneously improve the electrochemical performance,thermal stability and incombustibility of separator.Melamine cyanurate(MCA),as a low-cost and reliable flame-retardant HOF,was implemented in the separator modification layer,which can prevent the battery short circuit even at a high temperature.In addition,the supermolecule properties of MCA provide unique physical and chemical microenvironment for regulating ion-transport behavior in electrolyte.The MCA coating layer enabled the nickel-rich layered oxide cathode with a high-capacity retention of 90.3％after 300 cycles at 1.0 C.Collectively,the usage of MCA in lithium-ion batteries(LIBs)affords a simple,low-cost and efficient strategy to improve the security and service life of nickel-rich layered cathodes.

Hydrogen-bonded organic frameworkModified separatorNi-rich layered oxide cathodeThermal runawayLi+transference number

Chengyu Han、Yu Cao、Ming Yang、Yuhan Wang、Di Tang、Shaojie Zhang、Yiran Jia、Yiming Zhang、Hern Kim、Fusheng Pan、Zhongyi Jiang、Jie Sun

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Key Laboratory for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

Science and Technology on Power Sources Laboratory,Tianjin Institute of Power Sources,Tianjin 300384,China

Department of Energy Science and Technology Director,Environmental Waste Recycle Institute,Yongin 17058,Republic of Korea

Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China

School of Chemistry and Chemical Engineering,Hainan University,Haikou 570228,Hainan,China

Quzhou Institute for Innovation in Resource Chemical Engineering,Quzhou 324000,Zhejiang,China

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National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

2022YFA1504100220052152227908922178251

2024

10.1016/j.jechem.2024.04.034

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)：2024.96(9)