Boosting the interfacial dynamics and thermodynamics in polyanion cathode by carbon dots for ultrafast-charging sodium ion batteries

Li, Yujin1; Mei, Yu1; Momen, Roya2,3; Song, Bai4; Huang, Yujie1; Zhong, Xue1; Ding, Hanrui1; Deng, Wentao1; Zou, Guoqiang1; Hou, Hongshuai1; Ji, Xiaobo1

2023-11-01

10.1039/d3sc05593k

CHEMICAL SCIENCE   影响因子和分区

2041-6520

2041-6539

["Ultrafast-charging is the focus of next-generation rechargeable batteries for widespread economic success by reducing the time cost. However, the poor ion diffusion rate, intrinsic electronic conductivity and structural stability of cathode materials seriously hinder the development of ultrafast-charging technology. To overcome these challenges, an interfacial dynamics and thermodynamics synergistic strategy is proposed to synchronously enhance the fast-charging capability and structural stability of polyanion cathode materials. As a case study, a Na3V2(PO4)3 composite (NVP/NSC) is successfully obtained by introducing an interface layer derived from N/S co-doped carbon dots. Density functional theory calculations validate that the interfacial bonding effect of V-N/S-C significantly reduces the Na+ transport energy barrier. D-band center theory analysis confirms the downward shift of the V d-band center enhances the strength of the V-O bond and considerably inhibits irreversible phase transformation. Benefitting from this interfacial synergistic strategy, NVP/NSC achieves a high capability and excellent cycling stability with a surprisingly low carbon content (2.23%) at an extremely high rate of 100C for 10 000 cycles (87.2 mA h g-1, 0.0028% capacity decay per cycle). Furthermore, a superior performance at 5C (115.3 mA h g-1, 92.1% capacity retention after 800 cycles) is exhibited by the NVP/NSC||HC full cell. These findings provide timely new insights for the systematic design of ultrafast-charging cathode materials.","An interfacial dynamics and thermodynamics synergistic strategy is proposed to synchronously enhance the fast-charging capability of polyanion cathode materials for SIBs, and the designed NVP/NSC cathode exhibits excellent performance at 100C."]

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China["52261135632","22379165","52074359","U21A20284"] ; National Natural Science Foundation of China[2021RC3014]

Chemistry

Chemistry, Multidisciplinary

WOS:001116812400001

ROYAL SOC CHEMISTRY

20235115233202

Carbon ; Cathodes ; Charging (batteries) ; Chemical bonds ; Density functional theory ; Metal ions ; Phase transitions ; Sodium compounds ; Stability ; Thermodynamics

Metallurgy:531.1 ; Thermodynamics:641.1 ; Secondary Batteries:702.1.2 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

1.Cent South Univ, Coll Chem & Chem Engn, State Key Lab Powder Met, Changsha 410083, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China
4.Dongying Cospowers Technol Ltd Co, Dongying, Peoples R China

Li, Yujin,Mei, Yu,Momen, Roya,et al. Boosting the interfacial dynamics and thermodynamics in polyanion cathode by carbon dots for ultrafast-charging sodium ion batteries[J]. CHEMICAL SCIENCE,2023,15:349-363.

Li, Yujin.,Mei, Yu.,Momen, Roya.,Song, Bai.,Huang, Yujie.,...&Ji, Xiaobo.(2023).Boosting the interfacial dynamics and thermodynamics in polyanion cathode by carbon dots for ultrafast-charging sodium ion batteries.CHEMICAL SCIENCE,15,349-363.

Li, Yujin,et al."Boosting the interfacial dynamics and thermodynamics in polyanion cathode by carbon dots for ultrafast-charging sodium ion batteries".CHEMICAL SCIENCE 15(2023):349-363.