Electrochemical properties of nickel-precipitated pyrite as cathode active material for lithium/pyrite cell

被引：23

作者：

Choi, Y. J. ^{[1
]}

Kim, N. W. ^{[1
]}

Kim, K. W. ^{[1
]}

Cho, K. K. ^{[1
]}

Cho, G. B. ^{[1
]}

Ahn, H. J. ^{[1
]}

Ahn, J. H. ^{[1
]}

Ryu, K. S. ^{[2
]}

Gu, H. B. ^{[3
]}

机构：

[1] Gyeongsang Natl Univ, I Cube Ctr, ITRC Energy Storage & Convers, Jinju 660701, Gyeongnam, South Korea

[2] Univ Ulsan, Dept Chem, Ulsan 680749, South Korea

[3] Chonnam Natl Univ, Dept Elect Engn, Coll Engn, Kwangju, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期

关键词：

Lithium/pyrite cell; Pyrite cathode; Electroless nickel plating; Precipitation; NATURAL PYRITE; BATTERIES; ELECTRODE; SULFIDES;

D O I：

10.1016/j.jallcom.2009.05.140

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 effects of nickel precipitation and the cut-off voltage on the electrochemical properties of a pyrite cathode were investigated by using an electroless nickel-plating method. After nickel precipitation, some nickel particles that were precipitated on the surface of pyrite accumulated between the pyrite powder particles. In the voltage range of 0.4-3.2 V, a cell with nickel-precipitated pyrite exhibited a rapid decrease in discharge capacity and poor columbic efficiency. On the other hand, in the voltage range of 0.8-2 4 V. the cell showed an improved cycle life property and good coulombic efficiency because irreversible reactions below 0.8 V and sulfur oxidation above 2.4 V were suppressed by controlling the cut-off potential and the internal resistance was decreased by nickel precipitation. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：462 / 466

页数：5

共 14 条

[1] Morphological characteristics of Ni sulfides fabricated by chemical vapor deposition [J].