2020
DOI: 10.1007/s11426-019-9647-8
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Raising the capacity of lithium vanadium phosphate via anion and cation co-substitution

Abstract: The pursuit for batteries with high specific energy provokes the research of high-voltage/capacity cathode materials with superior stability and safety as the alternative for lithium iron phosphate. Herein, using the sol-gel method, a lithium vanadium phosphate with higher average discharge voltage (3.8 V, vs. Li + /Li) was obtained from a single source for Mg 2+ and Cl − co-substitution and uniform carbon coating, and a nearly theoretical capacity (130.1 mA h g −1 ) and outstanding rate performance (25 C) ar… Show more

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Cited by 14 publications
(3 citation statements)
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“…Surface modification has been widely used to improve electron transfer and enhance the cycling stability of LVP [24,25] . In addition, the heteroatomic doping can affect the electrochemical potentials and tune the intrinsic electronic conductivity of LVP by partial substitutions at Li or vanadium (V) sites [26][27][28] , phosphate group (PO 4 ) [29] , or even anion and cation codoping [30] , leading to the reduction of electronic bandgaps, the formation of vacancy, and the decrease of energy barriers.…”
Section: Introductionmentioning
confidence: 99%
“…Surface modification has been widely used to improve electron transfer and enhance the cycling stability of LVP [24,25] . In addition, the heteroatomic doping can affect the electrochemical potentials and tune the intrinsic electronic conductivity of LVP by partial substitutions at Li or vanadium (V) sites [26][27][28] , phosphate group (PO 4 ) [29] , or even anion and cation codoping [30] , leading to the reduction of electronic bandgaps, the formation of vacancy, and the decrease of energy barriers.…”
Section: Introductionmentioning
confidence: 99%
“…30,31 In order to improve the electrochemical performance of SIBs, researchers explored different modification methods to improve the conductivity and ionic diffusion rate, including carbon coating and bulk doping. 32,33 Element substitution is a useful method to effectively improve battery performance and prevent structural collapse. [34][35][36] In this work, a dual modification strategy of Mn 2+ /Ti 4+ co-substitution is proposed for the first time.…”
Section: Introductionmentioning
confidence: 99%
“…NASICON compounds are a class of materials with three-dimensional fast ionic conductors and can also be used as electrode materials. The NASICON structure is composed of a MO 6 octahedron and a PO 4 tetrahedron arranged end to end to form a framework anion . The strong P–O covalent bonds in the crystal structure of polyanionic compounds entitle them to good structural and thermodynamic stability, even under a high charging–discharging rate .…”
mentioning
confidence: 99%