Journal
ENERGY STORAGE MATERIALS
Volume 5, Issue -, Pages 93-102Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ensm.2016.06.004
Keywords
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Funding
- Thousands Talents program for the pioneer researcher and his innovation team, China
- National Science Foundation of China [51374029]
- National Science Foundation (NSF) [DMR-1505902]
- Program for New Century Excellent Talents in University [NCET-13-0668]
- Fundamental Research Funds for the Central Universities [FRF-TP-14-008C1]
- China Postdoctoral Science Foundation [2015M570987]
- Beijing Natural Science Foundation [2154059]
- National Natural Science Foundation of China [51472055, 61404034]
- External Cooperation Program of BIC, Chinese Academy of Sciences [121411KYS820150028]
- Annual BeijingTalents Fund
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1505902] Funding Source: National Science Foundation
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Li3V2(PO4)(3) (LVP) and Li4Ti5O12 (LTO) were chosen as the cathode and the anode to build a full battery owing to their robust structures. Electrospinning method was adopted to control the electrode materials with the expected microstructures-nanowires that shorten solid state diffusion pathway and enhance the surface area for improving their electrochemical performances. LVP cathode and LTO anode can deliver reversible specific capacities of 108 and 149 mAh/g at a rate of 5 C, respectively. No appreciable degradation can be perceived in both electrodes over 500 cycles. In addition, the relatively high voltage of LTO anode ensures the safe rapid charge and discharge (no dendrite growth) and the minimal or no initial loss of lithium ions as there is no formation of SEI layer. A full battery with LVP cathode and LTO anode delivers a maximum power density of 12,046 W/kg, reaching the strength of supercapacitors, while offers a high energy density of 90 Wh/kg at a power density of 1,350 W/kg with a charging or discharge time of 7 min. This battery demonstrates an energy storage efficiency close to 95% at a rate of 2 C and maintains > 90% efficiency at 20 C. (C) 2016 Elsevier B. V. All rights reserved.
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