Journal
NANOSCALE
Volume 7, Issue 2, Pages 619-624Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr04847d
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Funding
- National Program on Key Basic Research Project of China (973 Program) [2014CB239701]
- National Natural Science Foundation of China [21173120, 51372116]
- Natural Science Foundations of Jiangsu Province [BK2011030]
- Fundamental Research Funds for the Central Universities of NUAA [NP2014403]
- Funding for Outstanding Doctoral Dissertation in NUAA [BCXJ14-10]
- Funding of Jiangsu Innovation Program for Graduate Education [KYLX_0255]
- Fundamental Research Funds for the Central Universities
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As a competitor for Li4Ti5O12 with a higher capacity and extreme safety, monoclinic TiNb2O7 has been considered as a promising anode material for next-generation high power lithium ion batteries. However, TiNb2O7 suffers from low electronic conductivity and ionic conductivity, which restricts the electrochemical kinetics. Herein, a facile and advanced architecture design of hierarchical TiNb2O7 microspheres is successfully developed for large-scale preparation without any surfactant assistance. To the best of our knowledge, this is the first report on the one step solvothermal synthesis of TiNb2O7 microspheres with micro-and nano-scale composite structures. When evaluated as an anode material for lithium ion batteries, the electrode exhibits excellent high rate capacities and ultra-long cyclability, such as 258 mA h g(-1) at 1 C, 175 mA h g(-1) at 5 C, and 138 mA h g(-1) at 10 C, extending to more than 500 cycles.
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