Achieving High-Capacity Cathode Presodiation Agent Via Triggering Anionic Oxidation Activity in Sodium Oxide

被引：17

作者：

Chen, Yilong ^{[1
,2
]}

Zhu, Yuanlong ^{[1
]}

Sun, Zhefei ^{[3
]}

Kuai, Xiaoxiao ^{[1
,2
]}

Chen, Jianken ^{[1
]}

Zhang, Baodan ^{[1
]}

Yin, Jianhua ^{[1
]}

Luo, Haiyan ^{[1
]}

Tang, Yonglin ^{[1
]}

Zeng, Guifan ^{[1
]}

Zhang, Kang ^{[1
]}

Li, Li ^{[1
]}

Xu, Juping ^{[4
,5
]}

Yin, Wen ^{[4
,5
]}

Qiu, Yongfu ^{[6
]}

Zou, Yeguo ^{[1
,2
]}

Ning, Ziyang ^{[7
]}

Ouyang, Chuying ^{[7
,8
]}

Zhang, Qiaobao ^{[3
]}

Qiao, Yu ^{[1
,2
]}

Sun, Shi-Gang ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Dept Chem, Xiamen 361005, Peoples R China

[2] Tan Kah Kee Innovat Lab, Fujian Sci & Technol Innovat Lab Energy Mat China, Xiamen 361005, Peoples R China

[3] Xiamen Univ, Coll Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[4] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[5] Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China

[6] Dongguan Univ Technol, Sch Mat Sci & Engn, Dongguan 523808, Guangdong, Peoples R China

[7] Contemporary Amperex Technol Co Ltd CATL, Fujian Sci & Technol Innovat Lab Energy Devices, 21C Lab, Ningde 352100, Peoples R China

[8] Jiangxi Normal Univ, Dept Phys, Lab Computat Mat Phys, Nanchang 330022, Peoples R China

来源：

ADVANCED MATERIALS | 2024年 / 36卷 / 36期

关键词：

anionic redox; antifluorite structure sodium oxide; cathode presodiation; Na-ion battery full-cell; transition metal implantation; HIGH-ENERGY-DENSITY; LI-ION; BATTERY; NANOSHEETS; OVERCOME;

D O I：

10.1002/adma.202407720

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Compensating for the irreversible loss of limited active sodium (Na) is crucial for enhancing the energy density of practical sodium-ion batteries (SIBs) full-cell, especially when employing hard carbon anode with initially lower coulombic efficiency. Introducing sacrificial cathode presodiation agents, particularly those that own potential anionic oxidation activity with a high theoretical capacity, can provide additional sodium sources for compensating Na loss. Herein, Ni atoms are precisely implanted at the Na sites within Na2O framework, obtaining a (Na0.89Ni0.05 square(0.06))(2)O (Ni-Na2O) presodiation agent. The synergistic interaction between Na vacancies and Ni catalyst effectively tunes the band structure, forming moderate Ni-O covalent bonds, activating the oxidation activity of oxygen anion, reducing the decomposition overpotential to 2.8 V (vs Na/Na+), and achieving a high presodiation capacity of 710 mAh/g(approximate to Na2O) (Na2O decomposition rate >80%). Incorporating currently-modified presodiation agent with Na3V2(PO4)(3) and Na2/3Ni2/3Mn1/3O2 cathodes, the energy density of corresponding Na-ion full-cells presents an essential improvement of 23.9% and 19.3%, respectively. Further, not limited to Ni-Na2O, the structure-function relationship between the anionic oxidation mechanism and electrode-electrolyte interface fabrication is revealed as a paradigm for the development of sacrificial cathode presodiation agent.

引用

页数：11

共 71 条

[1]

Bai SY, 2016, NAT ENERGY, V1, DOI [10.1038/NENERGY.2016.94, 10.1038/nenergy.2016.94]

[2] Unified picture of anionic redox in Li/Na-ion batteries [J].