The exploration for post-carbon electrode ma- terials for lithium-ion batteries has been a crucial way to satisfy the ever-growing demands for better performance with higher energy/power densities, enhanced safety, an...The exploration for post-carbon electrode ma- terials for lithium-ion batteries has been a crucial way to satisfy the ever-growing demands for better performance with higher energy/power densities, enhanced safety, and longer cycle life. Transition metal oxides have recently re- ceived a great deal of attention as very promising anode materials due to their high theoretical capacity, good safety, eco-benignity, and huge abundance. The present work re- views the latest advances in developing novel transition metal oxides, including FeeO3, Fe3O4, CO3O4, CoO, NiO, MnO, Mn203, Mn3O4, MnO2, MOO3, Cr2O3, Nb2O5, and some binary oxides such as NiCO2O4, ZnCO2O4, MnCO2O4 and CoMn2O4. Nanostructuring and hybrid strategies ap- plicable to transition metal oxides are summarized and analyzed. Furthermore, the impacts of binder choice and heat treatment on electrochemical performance are discussed.展开更多
以70 t EAF-GOR-LF-CC工艺生产304不锈钢为背景,分别对GOR冶炼过程初始钢液、终点钢液以及还原渣取样分析,重点考察了还原渣碱度、渣中残余Cr_2O_3质量分数(w((Cr_2O_3)))以及钢液初始硫质量分数(w([S_s]))对钢液深脱硫效果的影响规律,...以70 t EAF-GOR-LF-CC工艺生产304不锈钢为背景,分别对GOR冶炼过程初始钢液、终点钢液以及还原渣取样分析,重点考察了还原渣碱度、渣中残余Cr_2O_3质量分数(w((Cr_2O_3)))以及钢液初始硫质量分数(w([S_s]))对钢液深脱硫效果的影响规律,得出了以下结论:还原渣碱度对脱硫有较大影响,高炉渣碱度有利于钢液脱硫,但当炉渣碱度达到1.75以上时,炉渣碱度对终点硫质量分数(w([Sf]))的影响逐步变小。还原渣中残余Cr_2O_3对脱硫有阻碍作用,尽可能降低渣中w((Cr_2O_3))有利于提高GOR脱硫效果,当w((Cr_2O_3))降低到0.3%以下时,表观渣-钢间硫分配比(LS°=w((S))/w([S]))明显升高。GOR初始钢液硫质量分数越低,越容易获得最终低硫钢液,当w([S_s])<0.07%时,钢液中最低w([S_f])更容易降低到0.004%以下。根据GOR工业试验结果得出了冶炼终点时优化的表观渣-钢间硫分配比(LS°)随还原渣碱度、w((Cr_2O_3))和w([S_s])的变化关系。展开更多
基金supported by the National Basic Research Program of China(2013CB934103)the National Natural Science Foundation of China(21173054)Science & Technology Commission of Shanghai Municipality(08DZ2270500)
文摘The exploration for post-carbon electrode ma- terials for lithium-ion batteries has been a crucial way to satisfy the ever-growing demands for better performance with higher energy/power densities, enhanced safety, and longer cycle life. Transition metal oxides have recently re- ceived a great deal of attention as very promising anode materials due to their high theoretical capacity, good safety, eco-benignity, and huge abundance. The present work re- views the latest advances in developing novel transition metal oxides, including FeeO3, Fe3O4, CO3O4, CoO, NiO, MnO, Mn203, Mn3O4, MnO2, MOO3, Cr2O3, Nb2O5, and some binary oxides such as NiCO2O4, ZnCO2O4, MnCO2O4 and CoMn2O4. Nanostructuring and hybrid strategies ap- plicable to transition metal oxides are summarized and analyzed. Furthermore, the impacts of binder choice and heat treatment on electrochemical performance are discussed.
文摘以70 t EAF-GOR-LF-CC工艺生产304不锈钢为背景,分别对GOR冶炼过程初始钢液、终点钢液以及还原渣取样分析,重点考察了还原渣碱度、渣中残余Cr_2O_3质量分数(w((Cr_2O_3)))以及钢液初始硫质量分数(w([S_s]))对钢液深脱硫效果的影响规律,得出了以下结论:还原渣碱度对脱硫有较大影响,高炉渣碱度有利于钢液脱硫,但当炉渣碱度达到1.75以上时,炉渣碱度对终点硫质量分数(w([Sf]))的影响逐步变小。还原渣中残余Cr_2O_3对脱硫有阻碍作用,尽可能降低渣中w((Cr_2O_3))有利于提高GOR脱硫效果,当w((Cr_2O_3))降低到0.3%以下时,表观渣-钢间硫分配比(LS°=w((S))/w([S]))明显升高。GOR初始钢液硫质量分数越低,越容易获得最终低硫钢液,当w([S_s])<0.07%时,钢液中最低w([S_f])更容易降低到0.004%以下。根据GOR工业试验结果得出了冶炼终点时优化的表观渣-钢间硫分配比(LS°)随还原渣碱度、w((Cr_2O_3))和w([S_s])的变化关系。
