Phase-Selective Synthesis of Nickel Phosphide in High-Boiling Solvent for All-Solid-State Lithium Secondary Batteries

被引:51
作者
Aso, Keigo [1 ]
Hayashi, Akitoshi [1 ]
Tatsumisago, Masahiro [1 ]
机构
[1] Osaka Prefecture Univ, Dept Appl Chem, Grad Sch Engn, Naka Ku, Osaka 5998531, Japan
基金
日本科学技术振兴机构; 日本学术振兴会;
关键词
GLASS-CERAMIC ELECTROLYTES; NIP2 NEGATIVE ELECTRODES; ION BATTERIES; ELECTROCHEMICAL REACTIVITY; THERMAL-DECOMPOSITION; GENERALIZED SYNTHESIS; OXIDE NANOCRYSTALS; INTERCALATION; CONDUCTIVITY; CHALLENGES;
D O I
10.1021/ic2013733
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Nickel phosphide particles were synthesized by thermal decomposition of a nickel precursor in a mixed solution of trioctylphosphine and trioctylphosphine oxide. The crystal phase and morphology of samples prepared by changing the solvents, the amount of trioctylphosphine as a phosphorus source, the reaction temperature, and the nickel precursor were characterized using X-ray diffraction and transmission electron microscopy. Spherical Ni(5)P(4) particles with diameters of 500 nm were obtained using nickel acetylacetonate as a nickel precursor at 360 degrees C for 1 h in trioctylphosphine oxide. NiP(2) particles with diameters of 200-500 nm were obtained using nickel acetate tetrahydrate at 360 degrees C for 5 h in trioctylphosphine oxide. All-solid-state cells were fabricated using NiP(2) particles as an active material and 80Li(2)S center dot 20P(2)S(5) (mol %) glass ceramic as a solid electrolyte. The Li-In/80Li(2)S center dot 20P(2)S(5)/NiP(2) cell exhibited an initial discharge capacity of 1100 mAh g(-1) at a current density of 0.13 mA cm(-2) and retained a discharge capacity of 750 rnAh g(-1) after 10 cycles.
引用
收藏
页码:10820 / 10824
页数:5
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