单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,长寿命锰酸锂锂离子电池,Long life Lithium manganese oxide Li ion battery,1,研究背景,Research background,能源危机,Energy crisis,石油枯竭：现在已经探明的大概为,1,万,1500,亿桶。虽然这比前两年的估计数字增长了,10%,，但以目前的开采速度计算，地球上的石油储量只够满足全世界石油消费需要,41,年。据美国能源部门估计，今后,20,年内，世界石油还能供求平衡，但,20,年后就要面临缺油的局面。据美国,华尔街日报,最新的统计资料，按照目前的开采速度，世界原油,2002,年已探明储量还可以开采,40.6,年。加州技术学院的物理学者,D,古登斯坦在接受美国有线新闻网的财经杂志采访时说：“在未来的,10,到,20,年里可能会出现（石油短缺）。”他补充道：“或许，这种短缺已经开始了。”,2,环境污染,Environmental pollution,传统的化石燃料储量有限，面临枯竭；使用基本上是通过燃烧，燃烧会释放,SO,2,、氮的氧化物,NO,x,及,CO,2,等大气污染物，造成酸雨和温室效应。,3,汽车尾气排放的主要污染物为一氧化碳（,CO,）、碳氢化合物（,HC,）、氮氧化物（,NO,x,）、铅（,Pb,）等。,Vehicles produce the main part of pollutant in atmosphere such as CO,hydrocarbon compounds,NO,x,Pb and so on.,身边的污染,汽车,Pollution around usvehicles,4,锂离子电池的优点,The advantages of lithium ion batteries,比能量高,high power density,工作电压高,high rate,自放电率低,low self discharge,循环寿命长,long cycle life,无污染,low pollution,安全性能好,good safety characteristics,5,应 用,Application,mobile phones,Electric bicycles,Power tools,Electric toys,Mining lamps,emergency lamps,Vacuum cleaner,6,锰资源丰富,abundant Mn resource,价格低廉,low cost,环保,low pollution,安全,safety,高倍率,high rate,LiMn,2,O,4,的特点,The advantages of lithium manganese oxide cathode,不利因素,Problems to be resolved:,比容量较低,relatively low energy density,循环寿命较短,short cycle life,高温充放电循环过程中容量衰减快,significant capacity fading under high temperature,7,Mn,溶解的发生,Mn dissolution occurrence,充电,Charge,：,放电时正好相反。,Discharge is just opposite.,LiMn,2,O,4,示意图,Schematic diagram of LiMn,2,O,4,8,改进措施,Improvement,正极,Cathode,表面包覆,Surface coating,添加金属离子,Element doping,(for example,Ni,、,Fe,、,Co,、,Al,、,Si,、,Ti,、,Mo,、,La,、,Bi,、,Nb,、,Zn,、,Cr and so on),引入晶粒生长促进剂和界面能调节剂,Adding crystal growth accelerant and interfacial energy regulator,电解液,Electrolyte solution,不同功能添加剂,F,unctional additives,负极,Anode,合金与碳相混合,Alloy anodes mixed with carbon,9,XRD,XRD patterns of Modified LiMn,2,O,4,and LiMn,2,O,4,10,SEM,SEM graph of LiMn,2,O,4,SEM graph of doped LiMn,2,O,4,11,SEM graph of coated LiMn,2,O,4,12,锰酸锂高温（,60,）溶解试验,LiMn,2,O,4,high temperature(,60,)dissolution experiment,锰酸锂类型,电解液中溶解,Mn,的含量（,g/mL,）,LiMn,2,O,4,257.69,Modified LiMn,2,O,4,144.50,13,电解液,Electrolyte,电解液是锂离子电池的重要组成部分，它与正负极材料的相容性好坏，对电池性能有很大的影响。,Electrolyte is the main part of lithium ion batteries,and its compatibility with cathode or anode materials has greatly influenced on the battery performance.,与电解质相容性影响因素包括：正极表面膜的稳定性、电解液组分的氧化分解和,LiMn,2,O,4,在电解液中溶解。,14,电解液组分氧化：,Electrolyte oxidation,LiMn,2,O,4,高温分解：,LiMn,2,O,4,decomposition at high temperature,15,LiMn,2,O,4,在电解液中溶解：,LiMn,2,O,4,dissolution in electrolyte,痕量酸作用下，,LiMn,2,O,4,发生歧化反应：,The disproportion reaction of LiMn,2,O,4,in trace amount acids,16,添加剂,Additives,控制,HF,含量添加剂,:,Additives for decreasing HF,可以降低,HF,的含量，阻止其对电极的破坏和对,LiPF,6,分解的催化作用，提高电解液的稳定性，从而改善电池性能。,乙酰胺、,N,N-,二甲基甲酰胺、,N,N-,二甲基乙酰胺等胺类化合物、,N,N-,二环己基碳化二亚胺、,N,N-,二异丙基碳化二亚胺等碳化二亚胺、吡啶、六甲基磷酰胺,正极成膜添加剂,:,Membrane-forming additives,在活性物质表面发生了氧化和电聚合反应，形成覆盖在电极表面的导,Li,性和导电性薄膜。,联苯,(BP),、二苄,(DBZ),、,N-,甲基吡咯,(MPL),、噻吩（,TPN,）等，如芳香族化合物（,BP,DBI,DPE,等）,17,LiMn,2,O,4,在改性电解液中的电化学性能,Electrochemical performance of LiMn,2,O,4,in modified electrolyte,Discharge curves of LiMn,2,O,4,in modified electrolyte and normal eletrolyte,18,改性,LiMn,2,O,4,的倍率放电特性,Rate discharge property of modified LiMn,2,O,4,Discharge profiles of LiMn,2,O,4,/graphite and Modified LiMn,2,O,4,/graphite Li-ion batteries at various discharging rates between 3.0-4.2V;charge rate is fixed at 1,C,19,Cyclic performance of,Modified LiMn,2,O,4,/C,Li-ion batteries,at 10,C,（,3.0-4.2 V,）,20,Cyclic performance of,Modified LiMn,2,O,4,/C,Li-ion batteries,（,3.0-4.2V,）,21,Cyclic performance of,Modified LiMn,2,O,4,/C,Li-ion batteries,（,3.0-4.2V,）,22,Cyclic performance of,Modified LiMn,2,O,4,/C,Li-ion batteries,（,3.0-4.2V,）,23,改性,LiMn,2,O,4,的高温循环性能,Electrochemical performance of modified LiMn,2,O,4,at high temperature,The high-temperature performance of Modified LiMn,2,O,4,/C,Li-ion batteries,at 1,C,charge/discharge rate in 3.0-4.2 V,24,The high-temperature performance of Modified LiMn,2,O,4,/C,Li-ion batteries,at 1,C,charge/discharge rate in 3.0-4.2 V,25,The cyclic performance of Modified LiMn,2,O,4,/C,Li-ion batteries,at 1,C,charge/discharge rate in 3.0-4.2 V,26,展望,Prospect,基于以上改进，锰酸锂为正极材料的锂离子电池具备成本低、安全性高、倍率特性好、循环寿命长等优点，随着锰酸锂材料和电池技术的不断改进、优化，,我们相信锰酸锂完全可以应用到电动汽车用锂离子动力电池和大型的储能电池中！,We believe that lithium manganese oxide would be applied in lithium ion batteries for EVs and large energy storage batteries because of its advantages of low cost,safety,long life and superior rate capability!,27,THANK YOU FOR YOUR ATTENTION!,WELCOME TO VISIT OUR FACTORY!,邮编,Postcode,：,510760,电话,Telephone,：,地址,Addess,：广州市保税区保江路,200,号,28,