So variable charge surface is not a constant potential surface.
所以，可变电荷表面并非恒电位表面。
Elemental composition and BET surface area of pyrolysis carbon were investigated. X-ray diffraction pattern and constant-current charge-discharge properties of pyrolysis carbon were studied.
元素分析、氮气物理吸附和X射线衍射分别考察了裂解炭的元素组成、BET比表面积以及微晶结构变化；
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