Rational Synthesis of “Grape-like” Ni2V2O7 Microspheres as High-capacity Anodes for Rechargeable Lithium Batteries |
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| Authors: | Dawei Xia Dr Dongdong Wang Dr Wenlong Liu Prof Feng Gong |
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| Institution: | 1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096 P. R. China;2. Key Laboratory of Colloid and Interface Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 P. R. China;3. College of Food and Biological Engineering, Chengdu University, Chengdu, 610106 P. R. China |
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| Abstract: | Vanadates have received booming attention recently as promising materials for extensive electrochemical devices such as batteries and electrocatalysis. However, the enormous difficulties of achieving pure-phase transition metal vanadates, especially for nickel-based, hinder their exploitations. Herein, for the first time, by controlling the amount of ethylene glycol (EG) and reaction time, grape-like Ni2V2O7 (or V2O5/Ni2V2O7) microspheres were rationally fabricated. It is demonstrated that the EG can chelate both Ni2+ and VO3− to form organometallic precursors. As anode in lithium-ion batteries (LIBs), it could deliver superior reversible capacity of 1050 mAh/g at 0.1 A/g and excellent rate capability of 600 mAh/g at 4 A/g. The facile hydrothermal synthesis broadens the material variety of nickel vanadates and offers new opportunities for their wider applications in electrochemistry. |
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| Keywords: | Vanadates Lithium-ion batteries Nanostructures Transition metal oxides Hydrothermal reaction |
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