动力锂离子电池及其关键材料开发与评估-汪继强.ppt

Development and Evaluation of Power Li-ion Battery and Key Materials 动力锂离子电池及其关键材料开发与评估,Xingjiang LIU, Chengwei XIAO and Jiqiang WANG,National Key Lab. of Power Sources, China Tianjin Institute of Power Sources, Tianjin 300381, China,The 4th International Forum on Power LIB for EV , Oct. 17, 2009, Beijing,Outline,Introduction Development target and status of Power LIB Key materials for power LIB Technical issues and solution Summary,Introduction,National program for next generation power battery,USA: 2.4B$, 48 Projects, for Next-Generation of Batteries and Electric Vehicles Japan: 0.2B$, 42 subjects including Batteries for Stationary & Vehicle China: “13 cities, 1000 EVs” plan, “863”projects, “973” projects,Introduction,Table Comparison of electrochemical power sources,Technical requirement guidance (second stage) for power battery in eleventh five-year plan,Performance of Li-ion battery for EV,Key Materials,Cathode: LiMn2O4, LFP, NCM, LVP Anode: NGR, HC, LTO Electrolyte: LiPF6 based, LiBOB, ion liquid Separator: PE, PP, PP/PE/PP,Key Materials-LiMn2O4,Specific surface area: Samll Crystal: well Doping: Al、Cr、Zr Coating: Al2O3、ZrO2、AlPO4,Key Materials-LFP,Key Materials-NCM,Key Materials-LTO,Fig. High-rate discharge performance of the cell A on various C-rates at ambient temperature.,Fig. High-rate discharge performance of the cell B on various C-rates at ambient temperature.,Average voltage cell A: 2.4 V cell B: 1.8 V,Specific energy cell A: 67 Wh/kg cell B: 52 Wh/kg,SEM Observation of LTO/AC,Fig. SEM images of AC (a) and AC loaded Li4Ti5O12 (b).,LTO/AC,AC,Electrochemical Capacitor S/N: NCM-LTO-CNT0506 Voltage : 3.0-0.5V Capacity: 500mAh Tianjin Institute of Power Sources,Application of LTO/CNT in LIB/LIC,Fig. Photo of laminated cell with LTO/CNT negative electrode.,Fig. High rate discharge behivor of the cell with LTO/CNT negative electrode.,Technical issues and solution,1. Safety issue Material: LiMn2O4, LFP, Modified NCM Cell design: Capacity ratio of cathode/anode; Maximum power; Capacity-10Ah for HEV, 50Ah for EV; Structure-Heat dispersion and conductibility; The others: Additive, separator, safety vent,Technical issues and solution,2. Power and Life High power: 1) Increasing the electron and ion diffusion speed ; 2) Smaller particle size; 3) Thickness and porosity of electrode; 4) Electrolyte Longer life: 1) Cycle life; 2) Calendar life; Interface stability (SEI),Technical issues and solution,3. Specific Energy New material development Cathode: Layerd Mn based material; LVP Anode: Si based material,New Challenges,National program for next generation electrochemical power source,Period : year 2009 to year 2013,Battery : 300Wh/kg, based on lithium-ion system,High-Power Electrochemical Power Source: with specific power of 5000W/kg and specific energy of 20Wh/kg, based lithium-ion cell or electrochemical capacitor,.,Organized by Tianjin Institute of Power Sources,Fig. X-ray diffraction patterns of Li1.2+xNi1/4Mn3/40.8-xO2 powders (a) x = 0, (b) x = 0.0381, (c) x = 0.0727) and Lattice constants a, c, and V as a function of Li content.,Fig. 3. Scanning electron photographs of Li1.2+xNi1/4Mn3/40.8-xO2.,Layered Li1.2+xNi1/4Mn3/40.8-xO2 material,Cathode material,Fig. The first charge/discharge profiles & cycleability of Li1.2+xNi1/4Mn3/40.8-xO2.,Anode material,Fig. XRD plots of Si-based composites after heat treatment at 900C,Fig. TEM images of the Si-based composite with the SiO/graphite/coal.,Anode material,Fig. Charge/discharge curves of Si-SiO2-C at the current density of 100mA/g.,Fig. Cycliceability of the as-prepared Si-SiO2-graphite-carbon composites at the current density of 100mA/g. (3/0/3 3/1/2 3/2/1 3/1.5/1.5).,Summary,Active Materials Cathode: LMO, LFP, NCM; Anode: HC, NGC, LTO; Cell LMO or LFP or NCM / HC or NGC for PHEV, EV NCM or NCA / LTO for HEV Next Generation Mn rich layered material, LVP, Si based material,Thank you for your kind attentions! 欢迎参加 第28届全国化学与物理电源学术年会 28th Annual Meeting on Power Sources 2009年11月14日-16日 广州华泰宾馆,The 4th International Forum on Power LIB for EV , Oct. 17, 2009, Beijing,Advances of LiFePO4,Improving Conductivity of LiFePO4,SONY (2001) Synthesis