TY  - JOUR
AU  - Wang, Chun
AU  - Wang, Faxing
AU  - Zhao, Yujuan
AU  - Li, Yuhui
AU  - Yue, Qin
AU  - Liu, Yupu
AU  - Liu, Yong
AU  - Elzatahry, Ahmed A.
AU  - Al-Enizi, Abdullah
AU  - Wu, Yuping
AU  - Deng, Yonghui
AU  - Zhao, Dongyuan
PY  - 2016
TI  - Hollow TiO2–X porous microspheres composed of well-crystalline nanocrystals for high-performance lithium-ion batteries
JO  - Nano Research
SN  - 1998-0124
SP  - 165
EP  - 173
VL  - 9
IS  - 1
AB  - Hollow TiO2–X porous microspheres consisted of numerous well-crystalline nanocrystals with superior structural integrity and robust hollow interior were synthesized by a facile sol-gel template-assisted approach and two-step carbonprotected calcination method, together with hydrogenation treatment. They exhibit a uniform diameter of ~470 nm with a thin porous wall shell of ~50 nm in thickness. The Brunauer-Emmett-Teller (BET) surface area and pore volume are ~19 m2/g and 0.07 cm3/g, respectively. These hollow TiO2–X porous microspheres demonstrated excellent lithium storage performance with stable capacity retention for over 300 cycles (a high capacity of 151 mAh/g can be obtained up to 300 cycles at 1 C, retaining 81.6% of the initial capacity of 185 mAh/g) and enhanced rate capability even up to 10 C (222, 192, 121, and 92.1 mAh/g at current rates of 0.5, 1, 5, and 10 C, respectively). The intrinsic increased conductivity of the hydrogenated TiO2 microspheres and their robust hollow structure beneficial for lithium ion-electron diffusion and mitigating the structural strain synergistically contribute to the remarkable improvements in their cycling stability and rate performance.
UR  - https://doi.org/10.1007/s12274-015-0976-7
DO  - 10.1007/s12274-015-0976-7