Discharge Characteristics of Poly(Carbon Monofluoride) Prepared from the Residual Carbon Obtained by Thermal Decomposition of Poly(Dicarbon Monofluoride) and Graphite Oxide
The discharge performances have been investigated of poly(carbonmonofluorides), , prepared from the residual carbons obtained by the thermal decomposition of poly(dicarbon monofluoride), and graphite oxide. The residual carbons were composed of such crystallites having a smaller size along c‐axis than the dimension of ab‐axis. They were easily fluorinated, giving at a relatively low temperature in
研究了由聚一氟化碳热分解所得残余碳和氧化石墨制备的聚一氟化碳的放电性能。残余碳由沿 c 轴尺寸小于 a 轴尺寸的微晶组成。它们很容易氟化,在较短的时间内在相对较低的温度下产生。用本方法制备的石墨氟化物比在非水锂电池中直接氟化制备的石墨具有更高的放电电位。在 0.5 mAcm-2 的电流密度下实现的能量密度最大增加约为 30%。氟的利用率几乎是100%,放电电位的平坦度也很好。
TERNARY INTERCALATION COMPOUND OF GRAPHITE WITH ALUMINUM FLUORIDE AND FLUORINE
Ternaryintercalationcompound of graphite with AlF3 and F2, CxF(AlF3)y was prepared under fluorine atmosphere at temperatures of 20–400 °C. Typical 1st stage compound has a composition of C6F(AlF3)0.15 with repeat distance 9.40 A. Rapid progress in the reaction led to the formation of graphite fluoride, (C2F)n.
The preparation of planar-sheet graphite fluorides C x F with x < 2
作者:Rika Hagiwara、Michael Lerner、Neil Bartlett
DOI:10.1039/c39890000573
日期:——
The chemical fluorination of 2nd- and 3rd-stage graphite fluoroarsenate salt with F2 in liquid HF at ambient temperature produces a planar-sheetgraphitefluoride phase with a C/F ratio as low as 1.3.
Nuclear magnetic resonance study of fluorine-graphite intercalation compounds
作者:A M Panich、T Nakajima、H-M Vieth、A F Privalov、S D Goren
DOI:10.1088/0953-8984/10/34/016
日期:1998.8.31
electric conductivity, covalent C-F bonds start to occur. The number of these bonds grows with fluorine content resulting in a decrease in conductivity which is caused by a percolation mechanism rather than by a change in bondlength. A difference in chemical shift for fluorine-intercalated graphite and covalent graphite fluoride has been observed and is attributed to different C-F bonding in these compounds
Reversible intercalation of graphite by fluorine: a new bifluoride, C12HF2, and graphite fluorides, C x F (5 > x > 2)
作者:Thomas Mallouk、Neil Bartlett
DOI:10.1039/c39830000103
日期:——
A blue-black first-stage graphitefluoride, CxF (5 > x > 2), in which the planar carbon-atom sheets of graphite are preserved, is made by intercalation of graphite with fluorine in the presence of liquid hydrogen fluoride, at ca. 20 °C, the oxidation (which is electrochemically reversible for x > 2.6) proceeding via a highly conductive second stage salt: C12+HF2–.
在液态氟化氢存在下,通过石墨与氟的插层,制得蓝黑色的一级氟化碳C x F(5> x > 2),其中保留了平面碳原子的石墨片。在约。在20°C时,氧化作用(对于x > 2.6是电化学可逆的)通过高导电性的第二阶段盐C 12 + HF 2 –进行。