In situ anchoring in carbon matrix of Bi2O2CO3 as a high-performance anode material for Li-ion batteries

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外文摘要：Bismuth-based anode materials have been regarded as promising Li-ion batteries due to their high theoretical capacity.However,their low conductivity and associated volume expansion inhabited their commercial-ization.In this work,Bi2O2CO3@C composites were suc-cessfully synthesized by in situ anchoring of flower-like Bi2O2CO3 nanosheets on a carbon-based substrate via hydrothermal.The unique composited structure of Bi2O2-CO3@C leads to a stable specific capacity of 547 mAh·g-1 after 100 cycles at a current density of 0.1 A·g-1.Notably,it demonstrates excellent rate capability with a specific capacity of 210 mAh·g-1 at 5 A·g-1.After 550 cycles at a current density of 0.5 A·g-1,a high reversible capacity of nearly 400 mAh·g-1 was observed.Additionally,in situ X-ray diffraction measurements clearly demonstrate the conversion between Bi and Li3Bi during alloying/dealloy-ing,confirming the good electrochemical reversibility of the materials for Li storage.The reaction kinetics of Bi2O2CO3@C were further investigated using galvanos-tatic intermittent titration technique.Furthermore,Bi2O2-CO3@C exhibited excellent long-term stability,maintaining its high reversible capacity for over 200 cycles at a current density of 0.5 A·g-1 in a full cell configuration using Li1.20Mn0.54Ni0.13Co0.13O2 as the cathode material.This result further underscores its promising potential for lithium-ion batteries.This work may provide inspiration for the design of alloy-type negative electrode materials for high-performance rechargeable batteries.

外文关键词：

Bi2O2CO3Composite materialsAnode materialsFull batteries

作者：

Pu-Qiang He、Jun Guo、Hui Huang、Zhong-Cheng Guo

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作者单位：

Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China

Research Center of Metallurgical Electrode Materials Engineering Technology,Kunming 650106,China

Kunming Hendera Science and Technology Co.,Ltd.,Kunming 650106,China

基金：

Yunnan Fundamental Research ProjectsYunnan Fundamental Research ProjectsNational Natural Science Foundation of ChinaYunnan Provincial Major Science and Technology Special Plan Projects

项目编号：

202401AU070164202101AU07015752064028202202AF080002

出版年：

2024

DOI：

10.1007/s12598-024-02825-3

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

年,卷(期)：2024.43(8)