INSITU X-RAY ABSORPTION SPECTROSCOPIC STUDIES OF NICKEL-OXIDE ELECTRODES

被引：104

作者：

PANDYA, KI ^{[1
]}

HOFFMAN, RW ^{[1
]}

MCBREEN, J ^{[1
]}

OGRADY, WE ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1990年 / 137卷 / 02期

关键词：

D O I：

10.1149/1.2086450

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In situ transmission x-ray absorption spectroscopy was used to investigate changes in the structure of Ni(OH)2 as it was cycled as a nonsintered nickel oxide electrode in concentrated alkali. Results were obtained for dry as-prepared electrodes and electrodes that were charged or discharged. Changes were observed in the (0001) plane of the Ni(OH)2 as a function of cycling. In the charged material there was a contraction in the Ni-O and Ni-Ni distances. The EXAFS results and the XANES spectra strongly indicate that the Ni-O coordination is symmetrical in Ni(OH)2, whereas the coordination is asymmetric in the charged material. © 1990, The Electrochemical Society, Inc. All rights reserved.

引用

页码：383 / 388

页数：6

共 21 条

[1] CAUSE OF RESIDUAL CAPACITY IN NICKEL OXYHYDROXIDE ELECTRODES [J].