电池
電池
전지
BATTERY BIMONTHLY
2014年
1期
12-14
,共3页
杨帆%季辰辰%卫华%包淑娟
楊帆%季辰辰%衛華%包淑娟
양범%계신신%위화%포숙연
电气石%二氧化锰(MnO2)%超级电容器
電氣石%二氧化錳(MnO2)%超級電容器
전기석%이양화맹(MnO2)%초급전용기
tourmaline%manganese dioxide(MnO2)%supercapacitor
将具有特殊吸附特性的电气石与二氧化锰(MnO2)物理混合,制得电气石-MnO2电极。通过XRD、SEM对样品与电气石进行形貌与结构分析,用循环伏安、恒流充放电测试研究材料的电化学性能。当MnO2的质量为10 mg、电气石质量为12.5 mg时,电极在1 mol/L Na2 SO4中,以0.25 A/g的电流在-0.1~0.7 V放电,比电容可达347.0 F/g;电气石还可改善电极的循环稳定性,经过400次循环,电极的电容保持率可提高到90%。
將具有特殊吸附特性的電氣石與二氧化錳(MnO2)物理混閤,製得電氣石-MnO2電極。通過XRD、SEM對樣品與電氣石進行形貌與結構分析,用循環伏安、恆流充放電測試研究材料的電化學性能。噹MnO2的質量為10 mg、電氣石質量為12.5 mg時,電極在1 mol/L Na2 SO4中,以0.25 A/g的電流在-0.1~0.7 V放電,比電容可達347.0 F/g;電氣石還可改善電極的循環穩定性,經過400次循環,電極的電容保持率可提高到90%。
장구유특수흡부특성적전기석여이양화맹(MnO2)물리혼합,제득전기석-MnO2전겁。통과XRD、SEM대양품여전기석진행형모여결구분석,용순배복안、항류충방전측시연구재료적전화학성능。당MnO2적질량위10 mg、전기석질량위12.5 mg시,전겁재1 mol/L Na2 SO4중,이0.25 A/g적전류재-0.1~0.7 V방전,비전용가체347.0 F/g;전기석환가개선전겁적순배은정성,경과400차순배,전겁적전용보지솔가제고도90%。
Tourmaline with special adsorption characteristic was mixed with manganese dioxide (MnO2 )to prepare tourmaline-MnO2 electrode. The morphology and microstructure of samples and tourmaline were examined by SEM and XRD. Electrochemical performance of as-prepared samples was studied by cyclic voltammetry(CV)and galvanostatic charge/discharge. The specific capac-itance of 347.0 F/g was achieved in 1 mol/L Na2 SO4 electrolyte at the current density of 0.25 A/g and under the potential window of -0.1 ~0.7 V with a certain proportion(mMnO2 =10 mg,mDQ =12.5 mg). The cycle stability of electrode was improved by tour-maline,after 400 cycles,the capacitance retention of electrode was raised to 90%.