Enhanced metastability of high-density Li intercalation in boron-doped graphite

被引：11

作者：

Nalimova, VA

Bindra, C

Fischer, JE

机构：

[1] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104

[2] UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104

[3] UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 97卷 / 07期

关键词：

chemical synthesis; high pressure; X-ray diffraction; crystal structure;

D O I：

10.1016/0038-1098(95)00718-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

High-pressure reaction of Li metal and graphite yields LiC2, three times as dense in Li as the usual LiC6. LiC6 decomposes rapidly but incompletely into LiC6 + Li upon releasing pressure. A dramatic enhancement is observed in the metastability of the high Li density when the graphite contains 0.5 at.% substitutional boron. Average compositions from X-ray (OOL) intensities, determined several months after releasing the pressure, are LiC2.2 and LiC3.8 with and without boron respectively. The Li ''layer'' is split along c by 0.5 Angstrom suggesting a puckering which reduces the repulsive interactions.

引用

页码：583 / 585

页数：3

共 6 条

[1]

AVDEEV VV, 1990, HIGH PRESSURE RES, V6, P11

[2]

CONARD J, 1994, MOL CRYST LIQ CRYST, V244, P35

[3] INTERCALATION OF LITHIUM INTO GRAPHITE AND OTHER CARBONS [J].