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NaTi 2 (PO 4 ) 3 /N‐Doped Hard Carbon Nanocomposites with Sandwich Structure for High‐Performance Na‐Ion Full Batteries
Author(s) -
Sun Rong,
Zhang Xudong,
San Hui Kwan,
Zhang Keliang,
Xu Guogang,
Li Changgang,
Ma Jingyun,
He Wen
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000116
Subject(s) - anode , materials science , cathode , battery (electricity) , nanocomposite , mesoporous material , carbon fibers , chemical engineering , energy storage , doping , ion , power density , nanotechnology , composite number , electrode , composite material , optoelectronics , chemistry , power (physics) , physics , biochemistry , organic chemistry , quantum mechanics , engineering , catalysis
The well‐matched technology of cathode and anode in Na‐ion full batteries is highly challenging yet critically important in practical applications. Here, the high‐performance Na‐ion full batteries are developed by using NaTi 2 (PO 4 ) 3 /N‐doped mesoporous hard carbon hybrid anode and porous Na 3 V 2 (PO 4 ) 3 cathode. The different anodes are designed for well‐matched Na‐ion full batteries. The unique sandwich and mesoporous structural features endow the hybrid anode with a high reversible capacity (240 mAh g −1 at 1 C), high rate performance (109.7 mAh g −1 at 100 C), ultrahigh energy/power densities (76.56 Wh kg −1 /5104 W kg −1 ) and a long cycle‐life (capacity retention of 92.1 % after 1000 cycles at 100 C) in a half cell. In a full battery this hybrid anode can also deliver a higher capacitive contribution (79.5–87.7 %) and high energy/power densities (104 Wh kg −1 /5256 W kg −1 ). This design provides a promising pathway for developing high performance and low‐cost Na‐ion full batteries.