Dual redox-active copper hexacyanoferrate nanosheets as cathode materials for advanced sodium-ion batteries

Xu，Yue1; Wan，Jing2; Huang，Li3; Xu，Jia1; Ou，Mingyang1; Liu，Yi1; Sun，Xueping1; Li，Shuai3; Fang，Chun1; Li，Qing1; Han，Jiantao1; Huang，Yunhui1; Zhao，Yusheng3

2020-12-01

10.1016/j.ensm.2020.08.008

Energy Storage Materials   影响因子和分区

2405-8297

2405-8297

Prussian Blue Analogs (PBAs) such as copper hexacyanoferrate (CuHCF) are traditional intercalation cathodes for rechargeable Na-ion batteries. However, the electrochemical performance of these PBAs suffers from insufficient activation and sharp performance deterioration. Here, the insufficient electrochemical activity and frame deformation issues in the CuHCF cathodes were investigated to enhance their specific capacity and improve their cycling stability. The high-crystallinity CuHCF nanosheets (CuHCF-P) with low-water-content were synthesized by a pyrophosphate-assistant co-precipitation method. It has a highly reversible 1.5-Na insertion/desertion capability with a specific capacity of ~120 mAh g at 0.1 C, which is the highest among all the CuHCF cathodes reported. First-principle study and XPS detection demonstrate that both Cu and Fe are redox-active centers in CuHCF-P cathode, which facilitates a high Na storage capability. And the decrease of water content in CuHCF framework increases Fe/Cu 3d-orbital occupy-sites, which activates both of the transition-metals. Furthermore, the full cells fabricated with as-prepared CuHCF-P cathode and commercial hard carbon anode exhibit excellent performances with a reversible capacity of 109 mAh g at 0.1 C over 200 cycles.

Crystallization-controlled synthesis Pair distribution function analysis Prussian blue analogs Sodium-ion batteries

SCI ; EI

英语

其他

National Natural Science Foundation of China[51632001,51772117,51702111,51902118] ; National Key R&D Program of China[2016YFB0100302]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000599505100010

ELSEVIER

20203709170789

Precipitation (chemical) ; Metal ions ; Redox reactions ; Copper compounds ; Crystallinity ; Cathodes ; Copper ; Deterioration ; Nanosheets

Metallurgy:531.1 ; Copper:544.1 ; Secondary Batteries:702.1.2 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Solid State Physics:933 ; Crystalline Solids:933.1 ; Materials Science:951

2-s2.0-85090423982

Scopus

1.State Key Laboratory of Material Processing and Die & Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074,China
2.Department of Applied Physics,Chongqing University,Chongqing,401331,China
3.Department of Physics,Southern University of Science & Technology,Shenzhen,518055,China

Xu，Yue,Wan，Jing,Huang，Li,et al. Dual redox-active copper hexacyanoferrate nanosheets as cathode materials for advanced sodium-ion batteries[J]. Energy Storage Materials,2020,33:432-441.

Xu，Yue.,Wan，Jing.,Huang，Li.,Xu，Jia.,Ou，Mingyang.,...&Zhao，Yusheng.(2020).Dual redox-active copper hexacyanoferrate nanosheets as cathode materials for advanced sodium-ion batteries.Energy Storage Materials,33,432-441.

Xu，Yue,et al."Dual redox-active copper hexacyanoferrate nanosheets as cathode materials for advanced sodium-ion batteries".Energy Storage Materials 33(2020):432-441.