Changes in electronic structure between cobalt and oxide ions of lithium cobalt phosphate as 4.8-V positive electrode material

被引：78

作者：

Nakayama, M

Goto, S

Uchimoto, Y

Wakihara, M ^{[1
]}

Kitajima, Y

机构：

[1] Tokyo Inst Technol, Dept Appl Chem, Meguro Ku, Tokyo 1528552, Japan

[2] High Energy Accelerator Res Org, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

来源：

CHEMISTRY OF MATERIALS | 2004年 / 16卷 / 18期

关键词：

D O I：

10.1021/cm049230t

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：

Insight into electron exchange in LiCoPO4 electrodes for high-voltage lithium ion battery is presented using X-ray absorption spectroscopy (XAS). Despite the formation of the isolated valence electrons around the Co ion, O K-edge XAS reveals clear evidence that the hybridized orbital between Co and O plays an important role in the electron exchange arising from the electrochemical Li extraction.

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页码：3399 / 3401

页数：3

相关论文

共 15 条

[1] Olivine LiCoPO4 as 4.8 V electrode material for lithium batteries [J].

Amine, K ;

Yasuda, H ;

Yamachi, M .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2000, 3 (04) :178-179

[2] Electronically conductive phospho-olivines as lithium storage electrodes [J].

Chung, SY ;

Bloking, JT ;

Chiang, YM .

NATURE MATERIALS, 2002, 1 (02) :123-128

[3] ELNES investigations of the oxygen K-edge in spinels [J].

Docherty, FT ;

Craven, AJ ;

McComb, DW ;

Skakle, J .

ULTRAMICROSCOPY, 2001, 86 (3-4) :273-288

[4] CHARACTER OF HOLES IN LIXNI1-XO AND THEIR MAGNETIC-BEHAVIOR [J].

KUIPER, P ;

KRUIZINGA, G ;

GHIJSEN, J ;

SAWATZKY, GA ;

VERWEIJ, H .

PHYSICAL REVIEW LETTERS, 1989, 62 (02) :221-224

[5]

LEYZEROVICH NN, 2003, LITHIUM BATTERY DISC, pN7

[6] Using X-ray absorption spectroscopy to measure changes of electronic structure accompanying lithium insertion into the perovskite type oxides [J].

Nakayama, M ;

Imaki, K ;

Ra, W ;

Ikuta, H ;

Uchimoto, Y ;

Wakihara, M .

CHEMISTRY OF MATERIALS, 2003, 15 (08) :1728-1733

[7] Cathode properties of phospho-olivine LiMPO4 for lithium secondary batteries [J].

Okada, S ;

Sawa, S ;

Egashira, M ;

Yamaki, J ;

Tabuchi, M ;

Kageyama, H ;

Konishi, T ;

Yoshino, A .

JOURNAL OF POWER SOURCES, 2001, 97-8 :430-432

[8] Charge-discharge mechanism of LiCoPO4 cathode for rechargeable lithium batteries [J].

Okada, S ;

Sawa, S ;

Uebou, Y ;

Egashira, M ;

Yamaki, J ;

Tabuchi, M ;

Kobayashi, H ;

Fukumi, K ;

Kageyama, H .

ELECTROCHEMISTRY, 2003, 71 (12) :1136-1138

[9] Effect of structure on the Fe3+/Fe2+ redox couple in iron phosphates [J].

Padhi, AK ;

Nanjundaswamy, KS ;

Masquelier, C ;

Okada, S ;

Goodenough, JB .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (05) :1609-1613

[10] Phospho-olivines as positive-electrode materials for rechargeable lithium batteries [J].

Padhi, AK ;

Nanjundaswamy, KS ;

Goodenough, JB .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (04) :1188-1194