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Three-Dimensional Porous Hierarchically Architecture Li3VO4 Anode Materials for High-Performance Lithium-Ion Batteries Jiafeng Zhou, Bangchuan Zhao, Jiyue Song, Bozhou Chen, Jin Bai, Zhitang Fang, Jianming Dai, Xuebin Zhu, and Yuping Sun ACS Appl. Energy Mater., Just Accepted Manuscript • DOI: 10.1021/acsaem.8b01334 • Publication Date (Web): 30 Nov 2018 Downloaded from http://pubs.acs.org on December 4, 2018
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ACS Applied Energy Materials
Three-Dimensional Porous Hierarchically Architecture Li3VO4 Anode Materials for High-Performance Lithium-Ion Batteries Jiafeng Zhou†‡, Bangchuan Zhao*†, Jiyue Song†‡, Bozhou Chen†‡, Jin Bai†‡, Zhitang Fang†, Jianming Dai†, Xuebin Zhu†,and Yuping Sun†§ †
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
‡
§
University of Science and Technology of China, Hefei 230026, People' s Republic of China High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People’s
Republic of China *Corresponding author. *E-mail addresses:
[email protected] (Bangchuan Zhao) Tel: +86-0551-6559-2757.
Keywords: Li3VO4; electrostatic spray deposition; anode; porous hierarchically architecture; lithium-ion batteries
Abstract In this work, a binder-free self-supported three-dimensional (3D) porous Li3VO4 (LVO) and the carbon-coated Li3VO4 (LVO@C) anode materials are prepared on a Ni-foam disc by the electrostatic spray deposition (ESD) technique. The deposited materials exhibit a unique morphology with the sponge-like 3D porous hierarchically architecture. The novel structure can significantly enhance the surface area of the materials, relax the stress/strain of Li+ insertion/deinsertion, and obviously shorten the diffusion path of lithium ions in the charger/discharge progress. The porous nickel foam substrate can also provide an electric transport network and a structural supporting to the electrode, resulting into the much excellent rating and cycling 1
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performance. In addition, the coated carbon network can further facilitate the electric transport of the material. As a result, both the electrodes show outstanding electrochemical properties, especially the LVO@C electrode. The discharge capacities of LVO@C are 508.8, 424.1, 405, 377.5 and 340.1 mA h g-1 at 0.5, 5, 10, 20 and 30 C, respectively, and the capacity can persist 399 mA h g-1 without any capacity fading even after 1000 cycles at the current density of 10 C. The excellent properties make these LVO-based materials, especially the carbon-coated LVO composite, a promising anode candidate for the low-cost and high-performance LIBs.
Introduction Lithium-ion batteries (LIBs) with outstanding properties of long cycle life, high energy density, and environmental friendliness, and these advantages have attracted considerable attentions in the past few decades for practical applications, such as grid-scale energy storage, electric vehicles and mobile devices.1,
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Li4Ti5O12 are the two widespread used anode materials in commercial LIBs at present. However, with the fast-developing of applications in electric vehicles or hybrid electric vehicles, these conventional anode materials become more and more difficult to satisfy the ever-growing demands on energy and power densities, safety and lifetime. For graphite, the much lower ionic conductivity caused the poor rate capability, a huge volume change (~9%) during Li+ intercalation/deintercalation process weaken the cycle stability, especially the formation of lithium dendrites at the relatively low Li+ ions insertion potential (
