【摘 要】
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Practical applications of lithium-ion batteries(LIBs)with both high energy and power density are urgently demanded,which require suitable charge/dis-charge plat
【机 构】
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State Key Laboratory of Metastable Materials Science and Technology,Key Laboratory of Applied Chemis
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Practical applications of lithium-ion batteries(LIBs)with both high energy and power density are urgently demanded,which require suitable charge/dis-charge platform,fast charge-transfer kinetics,as well as optimal solid electrolyte interphase(SEI)layer of electrode materials.In this work,a high-performance lithium-ion battery(LIB)full cell was assembled by using commercial LiNi0.33Co0.33Mn0.33O2(NCM111)as the positive elec-trode and mixed Li4Ti5O12(LTO)/hard carbon(HC)as the negative electrode.It reveals that the component ratio between LTO and HC plays a critical role in manipulating the electric conductivity and the electro-reaction platform.The electrochemical test results show that when the content of HC is 10 wt%,the as-constructed full cell demonstrates the best electrochemical,with a maximum energy density of 149.2 Wh·kg-1 and a maximum power density of 2195 W·kg-1 at 10 A·g-1(30C).This outperforms all the assembled systems within our work range and the state-of-the-art literatures.The NCM//Li4Ti5O12+10 wt%HC battery system also exhibits a good capacity retention after 1000 cycles at the current density of 1 A·g-1.This work provides a new approach to enhance the full-cell perfor-mance by mixing electrode materials with different charge potentials and reaction kinetics.
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