In situ sol–gel synthesis of Ti2Nb10O29/C nanoparticles with enhanced pseudocapacitive contribution for a high-rate lithium-ion battery


Ti2Nb10O29/C nanoparticles with a carbon content of 13 wt% and a mean size of 50 nm were fabricated through a convenient and effective in situ sol–gel process. The small grain size and carbon modification can improve the pseudocapacitive effect of the Ti2Nb10O29/C nanoparticles, leading to excellent rate capacity, especially at high current rate. Specifically, the discharge capacity of the Ti2Nb10O29/C electrode is 258.3, 236.0, 216.6, 184.5 and 161.5 mAh·g−1 at different current densities of 1C, 5C, 10C, 20C and 30C. Nevertheless, the discharge capacity of the Ti2Nb10O29 electrode is 244.9 mAh·g−1 at 1C, which is rapidly reduced to 89.7 mAh·g−1 at 30C. In addition, the small size and carbon layer of the Ti2Nb10O29/C nanoparticles can supply abundant active sites for Li+ storage as well as enhance the electronic conductivity and Li+ diffusion, endowing these nanoparticles with a high discharge capacity and excellent cycle performance.

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This study was financially supported by the National Natural Science Foundation of China (No. 51802163), the National Natural Science Foundation of Henan Department of Education (No. 20A480004) and the China Postdoctoral Science Foundation (No. 2017M622564).

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Correspondence to Xiao-Di Liu.

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Liu, G., Zhao, Y., Tang, Y. et al. In situ sol–gel synthesis of Ti2Nb10O29/C nanoparticles with enhanced pseudocapacitive contribution for a high-rate lithium-ion battery. Rare Met. (2020).

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  • Nanoparticles
  • Anode materials
  • Sol–gel method
  • Energy storage