“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium StorageOA
Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte reaction.However,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term cyclability.Here,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical properties.During Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O movement.Such superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.
Yan Zhao;Qiang Yuan;Liting Yang;Guisheng Liang;Yifeng Cheng;Limin Wu;Chunfu Lin;Renchao Che
College of Physics,Donghua University,Shanghai 201620,People’s Republic of China School of Materials Science and Engineering,Institute of Materials for Energy and Environment,Qingdao University,Qingdao 266071,People’s Republic of ChinaSchool of Materials Science and Engineering,Institute of Materials for Energy and Environment,Qingdao University,Qingdao 266071,People’s Republic of ChinaLaboratory of Advanced Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Academy for Engineering&Technology,Fudan University,Shanghai 200438,People’s Republic of ChinaLaboratory of Advanced Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Academy for Engineering&Technology,Fudan University,Shanghai 200438,People’s Republic of ChinaZhejiang Laboratory,Hangzhou 311100,People’s Republic of ChinaInner Mongolia University,Hohhot 010021,People’s Republic of ChinaCollege of Physics,Donghua University,Shanghai 201620,People’s Republic of China School of Materials Science and Engineering,Institute of Materials for Energy and Environment,Qingdao University,Qingdao 266071,People’s Republic of ChinaCollege of Physics,Donghua University,Shanghai 201620,People’s Republic of China Laboratory of Advanced Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Academy for Engineering&Technology,Fudan University,Shanghai 200438,People’s Republic of China Zhejiang Laboratory,Hangzhou 311100,People’s Republic of China
化学工程
NiNb_(2)O_(6)porous fiber“Zero-strain”mechanismElectrochemical propertyHarsh-temperature operationOperando characterization
《Nano-Micro Letters》 2025 (1)
P.348-360,13
supported by the National Natural Science Foundation of China(51762014,52231007,12327804,T2321003,22088101)in part by the National Key Research Program of China under Grant 2021YFA1200600.
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