| Si/Ti_xSi_y复合物的合成及其锂离子电池负极性能研究 |
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| 引用本文： | 张文婷,汤兑海,霍启升.Si/Ti_xSi_y复合物的合成及其锂离子电池负极性能研究[J].分子科学学报,2017(6):460-465. |
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| 作者姓名： | 张文婷 汤兑海 霍启升 |
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| 基金项目： | 国家自然科学基金青年科学基金资助项目，无机合成与制备化学国家重点实验室(吉林大学)开放课题资助项目，生物质材料科学与技术教育部重点实验室开放基金资助项目，沈阳师范大学校内优秀人才支持计划资助项目，辽宁省高校重大科技平台“能源与环境催化工程技术研究中心”资助项目，辽宁省油气资源高效转化与洁净利用重点实验室资助项目，辽宁省油气资源高效转化与洁净利用工程研究中心资助项目 |
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| 摘 要： | 通过机械球磨和高温热处理合成得到Si和Ti_xSi_y纳米颗粒复合物Si/Ti_xSi_y,并对该化合物进行X射线能谱(EDX)、X射线衍射(XRD)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)表征.合成的Si/Ti_xSi_y和机械球磨的Si/TiO_2都被用于锂离子电池的负极材料,Si/Ti_xSi_y表现出优越的充放电性能、较好的循环稳定性和倍率性能.
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Improved performance of Si/TixSiy composite as anode for rechargeable Li-ion batteries |
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| Abstract: | Titanium silicide (TixSiy) was utilized to enhance the electrochemical properties of Si as a promising anode for Li-ion batteries.The Si/TixSiy composite,composed of Si with TixSiy nanoparticles,was synthesized by mechanical milling and annealing at high temperature.The obtained Si/TixSiy composite were characterized by X-ray diffraction,scanning electron microscopy,energy-dispersive X-ray spectroscopy,and transmission electron microscopy.The electrochemical properties of the Si/TixSiy composite and mechanically milled Si/TiO2 as anodes for Li-ion batteries were both investigated.The Si/TixSiy composite showed superior performance compared with the Si/TiO2 sample,including increased initial coulombic efficiency,enhanced rate capability,and better capacity retention. |
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