Realizing simultaneously enhanced energy and power density fullcell construction using mixed hard carbon/Li_(4)Ti_(5)O_(12) electrode

Practical applications of lithium-ion batteries(LIBs)with both high energy and power density are urgently demanded,which require suitable charge/discharge 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 LiNi_(0.33)Co_(0.33)Mn_(0.33)O_(2)(NCM111)as the positive electrode and mixed Li_(4)Ti_(5)O_(12)(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 of2195 W·kg^(-1) at 10 A·g^(-1)(30 C).This outperforms all the assembled systems within our work range and the state-ofthe-art literatures.The NCM//Li_(4)Ti_(5)O_(12)+10 wt%HC battery system also exhibits a good capacity retention after1000 cycles at the current density of 1 A·g^(-1).This work provides a new approach to enhance the full-cell performance by mixing electrode materials with different charge potentials and reaction kinetics.