Cation W-doping motivated novel layered K0.45Rb0.05 Mn 0.85-xWx Mg0.15O2 cathode for boosting potassium/sodium-ion storage

被引：0

作者：

Chen, Yucong ^{[2
,3
]}

Chen, Xiaobo ^{[2
,3
]}

Li, Jia ^{[2
,3
]}

Chen, Hongjie ^{[2
,3
]}

Su, Yixuan ^{[2
,3
]}

Chen, Weitao ^{[1
]}

Yu, Chengrun ^{[1
]}

Ling, Francis Chi-Chun ^{[5
]}

Ru, Qiang ^{[1
,2
,3
,4
]}

机构：

[1] South China Normal Univ, Sch Mat & New Energy, Shanwei 516625, Peoples R China

[2] South China Normal Univ, Guangdong Basic Res Ctr Excellence Struct & Fundam, Sch Phys, Key Lab Atom & Subatom Struct & Quantum Control,Mi, Guangzhou 510006, Peoples R China

[3] South China Normal Univ, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangdong Hong Kong Joint Lab Quantum Matter, Guangzhou 510006, Guangdong, Peoples R China

[4] SCNU Qingyuan Inst Sci & Technol Innovat Co Ltd, Qingyuan 511517, Peoples R China

[5] Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2025年 / 503卷

关键词：

W; -doping; Cathode materials; Potassium ion batteries; Sodium ion batteries; Full batteries; ELECTRODE; OXIDE; MICROSPHERES; BATTERIES;

D O I：

10.1016/j.cej.2024.158632

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Novel layered K0.45Rb0.05Mn0.85-xMg0.15WxO2 cathode materials modified with different ratios of W-doping are fabricated for potassium (PIBs) and sodium ion batteries (SIBs) by a facile solid-phase sintering strategy. Wdoping can dramatically amplify the lattice spacing, achieve narrow-sized primary particle and mitigate the lattice oxygen release from the surface of the material. Meanwhile, by comparing the SEM and XRD before and after cycling, the W-doping modification can effectively stabilize the lattice structure and inhibit the crack formation on the surface of the material. Further, W-doping alleviates the electrochemical polarization and lowers the diffusion barrier of potassium/sodium ions. Thus, benefiting from the reinforced structural stability, rapid ion mobility and conspicuous pseudocapacitance contribution, the K0.45Rb0.05Mn0.84Mg0.15W0.01O2 cathode harvests favourable potassium/sodium storage capability of 110.6 mAh/g at 20 mA g-1 in PIBs and 109.9 mAh/g at 100 mA g-1 in SIBs. Meanwhile, the favorable chemical performance can be also supported by the KRMMO-W1//Hard carbon K-/Na-ion full batteries, which increases the feasibility of practical applications.

引用

页数：12