Storage of Lithium-Ion by Phase Engineered MoO<sub>3</sub> Homojunctions
Dickon H. L. Ng,
Sheng Li,
Jun Li,
Jinning Huang,
Yingxue Cui,
Jiabiao Lian,
Chuan Wang
Affiliations
Dickon H. L. Ng
School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Longgang, Shenzhen 518172, China
Sheng Li
Key Laboratory of Zhenjiang, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Jun Li
Key Laboratory of Zhenjiang, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Jinning Huang
Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211800, China
Yingxue Cui
Key Laboratory of Zhenjiang, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Jiabiao Lian
Key Laboratory of Zhenjiang, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Chuan Wang
Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 Puzhu South Road, Nanjing 211800, China
With high theoretical specific capacity, the low-cost MoO3 is known to be a promising anode for lithium-ion batteries. However, low electronic conductivity and sluggish reaction kinetics have limited its ability for lithium ion storage. To improve this, the phase engineering approach is used to fabricate orthorhombic/monoclinic MoO3 (α/h-MoO3) homojunctions. The α/h-MoO3 is found to have excessive hetero-phase interface. This not only creates more active sites in the MoO3 for Li+ storage, it regulates local coordination environment and electronic structure, thus inducing a built-in electric field for boosting electron/ion transport. In using α/h-MoO3, higher capacity (1094 mAh g−1 at 0.1 A g−1) and rate performance (406 mAh g−1 at 5.0 A g−1) are obtained than when using only the single phase h-MoO3 or α-MoO3. This work provides an option to use α/h-MoO3 hetero-phase homojunction in LIBs.
