娄帅锋,尹鸽平,程新群,高金龙,马玉林,左朋建,高云智,杜春雨.碳改性 TiNb2 O7 及其对嵌脱锂性能的影响[J].表面技术,2015,44(1):41-46.
LOU Shuai-feng,YIN Ge-ping,CHENG Xin-qun,GAO Jin-long,MA Yu-lin,ZUO Peng-jian,GAO Yun-zhi,DU Chun-yu.Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance[J].Surface Technology,2015,44(1):41-46 |
| 碳改性 TiNb2 O7 及其对嵌脱锂性能的影响 |
| Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| 投稿时间：2015-01-04 修订日期：2015-01-20 |
| DOI： |
| 中文关键词: 锂离子电池 TiNb2O7 负极材料 导电性 电化学性能 |
| 英文关键词:lithium ion batteries TiNb2O7 anode materials conductivity electrochemical performance |
| 基金项目:国家自然科学基金资助(51472065) |
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| 中文摘要: |
| 目的 研究界面导电性对材料电化学性能的影响,提升 TiNb2O7 的循环稳定性。 方法 研究纯相 TiNb2O7 材料的电化学特性,对比不同荷电态(SOC)的极片,研究材料导电性对电化学性能的影响机制。 在材料的制备过程中加入不同的碳源构建导电网络,提升其导电性。 结果 得到了导电性对材料的影响机理,加入不同碳源显著提升了材料的循环稳定性。 结论 LixTiNb2O7 的导电性随嵌锂深度的增加而增大,导致材料的脱锂行为不能彻底进行。 通过加入碳纳米管或者蔗糖热解碳,可以有效提升材料的循环性能。 |
| 英文摘要: |
| Objective To investigate the effect of interfacial conductivity on the electrochemical performance and elevate the cycling stability of TiNb2O7. Methods The electrochemical characteristics of pure TiNb2O7 anode materials were studied, and the influencing mechanism of interfacial conductivity on the electrochemical performance was analyzed by comparing the electrodes with different state of charge (SOC). The conductive network was constructed by adding different carbon sources in the preparation process of the material, to elevate its conductivity. Results The influencing mechanism of the conductivity on the material was obtained. Addition of different carbon sources significantly elevated the cycling stability of the material. Conclusion The conductivity of LixTiNb2O7 increased with the increasing depth of lithiation, which resulted in the incomplete delithiation of the material. The cycling performance was markedly elevated after the addition of carbon nanotube or sucrose pyrolytic carbon. |
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