TY - JOUR
T1 - Sodium-rich iron hexacyanoferrate with nickel doping as a high performance cathode for aqueous sodium ion batteries
AU - Wang, Jie
AU - Mi, Changhuan
AU - Nie, Ping
AU - Dong, Shengyang
AU - Tang, Shengyang
AU - Zhang, Xiaogang
N1 - Funding Information:
This work was supported by the Fundamental Research Funds for the Central Universities (No.· NJ2016058 ), the Prospective Joint Research Project of Cooperative Innovation Fund of Jiangsu Province, China (No. BY2016003-13 ), the National Program on Key Basic Research Project of China (No. 2014CB239701 ) and the Funding for Outstanding Doctoral Dissertation in NUAA (No. BCXJ16-07 ), and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/6/1
Y1 - 2018/6/1
N2 - Na-rich NaxFeFe(CN)6 (NFF) in terms of low cost and high theoretical capacity has been considered to be a potential cathode material for aqueous sodium ion batteries (SIBs). However, low sodium content, poor Columbic efficiency (CE) and rapid capacity degradation impede their practical application. Herein, the effect of low-level Ni doping in NFF as cathode materials in 1 M NaNO3 electrolyte has been investigated, which were synthesized via a citrate-assisted co-precipitation route. NFF substituted with 23% Ni2+ exhibited the best electrochemical behaviors, which delivers a discharge capacity of 105.9 mAh g−1 at 200 mA g−1 and 73.1% capacity retention over 1000 cycles with an average CE of 99.8% at 1000 mA g−1. A reversible capacity of 55.5 mAh g−1 can be obtained even at a high current density of 2000 mA g−1. The Ni substitution strategy was evidenced to be a scalable method to prepare promising cathode materials with excellent cycling stability for high-performance aqueous SIBs.
AB - Na-rich NaxFeFe(CN)6 (NFF) in terms of low cost and high theoretical capacity has been considered to be a potential cathode material for aqueous sodium ion batteries (SIBs). However, low sodium content, poor Columbic efficiency (CE) and rapid capacity degradation impede their practical application. Herein, the effect of low-level Ni doping in NFF as cathode materials in 1 M NaNO3 electrolyte has been investigated, which were synthesized via a citrate-assisted co-precipitation route. NFF substituted with 23% Ni2+ exhibited the best electrochemical behaviors, which delivers a discharge capacity of 105.9 mAh g−1 at 200 mA g−1 and 73.1% capacity retention over 1000 cycles with an average CE of 99.8% at 1000 mA g−1. A reversible capacity of 55.5 mAh g−1 can be obtained even at a high current density of 2000 mA g−1. The Ni substitution strategy was evidenced to be a scalable method to prepare promising cathode materials with excellent cycling stability for high-performance aqueous SIBs.
KW - Aqueous electrolyte
KW - Cathode
KW - Nickel substitution
KW - Prussian blue analogues
KW - Sodium-ion batteries
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U2 - 10.1016/j.jelechem.2018.04.011
DO - 10.1016/j.jelechem.2018.04.011
M3 - Article
AN - SCOPUS:85045378123
SN - 1572-6657
VL - 818
SP - 10
EP - 18
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
ER -