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emmer n.二粒小麥。

emmet

The structures and characteristics of several graphite samples are measured by means of powder x - ray diffraction ( xrd ) , brunauer - emmer - teller ( bet ) surface area measurement , inductively coupled plasma ( icp ) spectroscopy , particle size analysis and electrochemical measurements . the effects of origin , structure , impurity , particle size , specific surface area of carbon materials on the electrochemical characteristics are studied . a synthetic graphite with abundant resources , low cost and favorable performance is determined as the raw material for modification of graphite 采用xrd 、 bet 、 icp 、激光粒徑分析及電化學性能測試等方法,對國內外多種典型石墨樣品的結構與性能進行比較,研究石墨材料的來源、晶體結構、雜質含量、顆粒大小、比表面積等因素對其充放電性能的影響,確定一種性能較好、價格低廉、來源廣泛的普通人造石墨粉作為熱處理與摻雜改性、以及復合結構炭材料研究的原材料。