| 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],44(1):41-46 |
| Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| Received:January 04, 2015 Revised:January 20, 2015 |
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| DOI： |
| KeyWord:lithium ion batteries TiNb2O7 anode materials conductivity electrochemical performance |
| Author | Institution |
| LOU Shuai-feng |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| YIN Ge-ping |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| CHENG Xin-qun |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| GAO Jin-long |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| MA Yu-lin |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| ZUO Peng-jian |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| GAO Yun-zhi |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
| DU Chun-yu |
Carbon-modified TiNb2O7 and Its Effect on Lithiation and Delithiation Performance |
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| Abstract: |
| 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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