Operando resonant soft X-ray emission spectroscopy of the LiMn2O4 cathode using an aqueous electrolyte solution

被引：3

作者：

Asakura, Daisuke ^{[1
,2
,3
]}

Nanba, Yusuke ^{[1
,6
]}

Niwa, Hideharu ^{[4
,5
,7
]}

Kiuchi, Hisao ^{[4
,5
]}

Miyawaki, Jun ^{[4
,5
,8
]}

Okubo, Masashi ^{[1
,9
]}

Matsuda, Hirofumi ^{[1
]}

Harada, Yoshihisa ^{[3
,4
,5
]}

Hosono, Eiji ^{[1
,2
,3
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Energy Conservat, Tsukuba, Ibaraki 3058585, Japan

[2] Natl Inst Adv Ind Sci & Technol, Global Zero Emiss Res Ctr, Tsukuba, Ibaraki 3058589, Japan

[3] AIST UTokyo Adv Operando Measurement Technol Open, Kashiwa, Chiba 2778565, Japan

[4] Univ Tokyo, Inst Solid State Phys ISSP, Kashiwa, Chiba 2778581, Japan

[5] Univ Tokyo, Synchrotron Radiat Res Org SRRO, Sayo, Hyogo 6795148, Japan

[6] Shinshu Univ, Res Initiat Supra Mat, Nagano, Nagano 3808553, Japan

[7] Univ Tsukuba, Fac Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

[8] Natl Inst Quantum Sci & Technol, Inst Adv Synchrotron Light Source, Sendai, Miyagi 9808579, Japan

[9] Waseda Univ, Sch Adv Sci & Engn, Dept Elect Engn & Biosci, Tokyo 1690555, Japan

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2022年 / 24卷 / 32期

关键词：

RECHARGEABLE LITHIUM BATTERY; ELECTROCHEMICAL PERFORMANCE; CYCLE PERFORMANCE; LIFEPO4; BEHAVIOR; MN; INTERCALATION; SPECTRA; FE;

D O I：

10.1039/d2cp01040b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Mn 3d electronic-structure change of the LiMn2O4 cathode during Li-ion extraction/insertion in an aqueous electrolyte solution was studied by operando resonant soft X-ray emission spectroscopy (RXES). The Mn L-3 RXES spectra for the charged state revealed the Mn4+ state with strong charge-transfer from the O 2p to Mn 3d orbitals dominates, while for the open-circuit-voltage and discharged states it is ascribed to the mixture of sites with Mn3+ and Mn4+ states. The degree of charge transfer is significantly different between the Mn3+ and Mn4+ states, indicating that the redox reaction takes place on the strongly-hybridized Mn 3d-O 2p orbital rather than the localized Mn 3d orbital.

引用

页码：19177 / 19183

页数：8

共 46 条

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