In this work,a multi-core-shell-structured LiFePO_(4)@Na_(3) V_(2)(PO_(4))_(3)@C(LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO_(4) cathode for li...In this work,a multi-core-shell-structured LiFePO_(4)@Na_(3) V_(2)(PO_(4))_(3)@C(LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO_(4) cathode for lithium-ion batteries.Transmission electron microscopy(TEM) confirms the inner NVP and outer carbon layers coexisted on the surface of LFP particle.When evaluated at low-temperature operation,LFP@NVP@C composite exhibits an evidently enhanced electrochemical performance in term of higher capacity and lower polarization,compared with LFP@C.Even at-10℃ with 0.5 C,LFP@NVP@C delivers a discharge capacity of ca.96.9 mAh-g^(-1) and discharge voltage of ca.3.3 V,which is attributed to the beneficial contribution of NVP coating.NAS ICON-structured NVP with an open framework for readily insertion/desertion of Li+ will effectively reduce the polarization for the electrochemical reactions of the designed LFP@NVP@C composite.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51902036)the Natural Science Foundation of Chongqing Science&Technology Commission(No.cstc2019jcyj-msxm1407)+5 种基金the Natural Science Foundation of Chongqing Technology and Business University(No.1952009)the Science and Technology Research Program of Chongqing Municipal Education Commission(Nos.KJQN201900826 and KJQN201800808)the Venture&Innovation Support Program for Chongqing Overseas Returnees(No.CX2018129)the Innovation Group of New Technologies for Industrial Pollution Control of Chongqing Education Commission(No.CXQT19023)the Engineering and Physical Sciences Research Council(EPSRC)(No.EP/S032886/1)the Key Disciplines of Chemical Engineering and Technology in Chongqing Colleges and Universities during the 13th Five Year Plan。
文摘In this work,a multi-core-shell-structured LiFePO_(4)@Na_(3) V_(2)(PO_(4))_(3)@C(LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO_(4) cathode for lithium-ion batteries.Transmission electron microscopy(TEM) confirms the inner NVP and outer carbon layers coexisted on the surface of LFP particle.When evaluated at low-temperature operation,LFP@NVP@C composite exhibits an evidently enhanced electrochemical performance in term of higher capacity and lower polarization,compared with LFP@C.Even at-10℃ with 0.5 C,LFP@NVP@C delivers a discharge capacity of ca.96.9 mAh-g^(-1) and discharge voltage of ca.3.3 V,which is attributed to the beneficial contribution of NVP coating.NAS ICON-structured NVP with an open framework for readily insertion/desertion of Li+ will effectively reduce the polarization for the electrochemical reactions of the designed LFP@NVP@C composite.
