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| 1 | CuO nanoflowers/copper fiber felt integrated porous electrode for lithium-ion batteries显示文摘The structure of current collectors has significant effects on the performance of a lithium-ion battery(LIB).In this study,we use copper fiber felts made by multi-tooth cutting and high-temperature solid-phase sintering as the current collector for LIBs.An integrated porous electrode based on CuO nanoflowers/copper fiber felt is developed for the anode.Results suggest that the reversible capacity and cycle stability of this new anode are significantly improved,compared with the pristine bare-surface copper plate under the same condition of rate cycles.The new anode structure based on the copper-fiber felt with a porosity of 60%exhibits a higher performance with an initial specific capacity of 609.5 mAh g^(-1)and retains 486.1 mAh g^(-1)after 200 cycles at a current density of 0.5 C.The improved electrochemical performance of this electrode is attributed to its large surface area of CuO nanoflowers and porous structure of the copper fiber felt,due to enhanced contact between the active material of CuO nanoflowers and electrolyte.This pore-rich structure makes the electrolyte easy to permeate into the electrode,shortens the diffusion path of Li^(+),reduces the internal resistance and alleviates the volume expansion of the active material during the insertion and desertion processes of Li^(+). | YUAN Wei YE YinTong YANG Yang ZHANG XiaoQing PAN BaoYou PENG ZiMing WU MuLun QIU ZhiQiang WANG Chun YUAN YuHang YAN ZhiGuo TANG Yong | 2020 | Science China(Technological Sciences)2020，63，11： | 1 |
| 2 | 基于锂离子半电池和全电池的碳包覆氧化铁复合材料的电化学性能研究显示文摘采用水热法制备了碳包覆氧化铁(Fe2O3@C)复合材料.直径为30~50nm的Fe2O3类球形颗粒表面有8nm左右的碳包覆层.Fe2O3@C复合材料在锂离子电池中展现出了良好的电化学性能.在Fe2O3@C∥Li半电池中,Fe2O3@C在100mA·g^-1下循环300周后可逆放电比容量为730mAh·g^-1.在LiCoO2∥Fe2O3@C全电池中,Fe2O3@C在电流为50,100,200,400和600mA·g^-1时的放电比容量分别为1140,777,669,557和451mAh·g^-1. | 袁光辉 耿敏 丁欢 张萍 刘新运 张永光 | 2020 | 河南师范大学学报(自然科学版)2020，48，6： | 1 |
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