研究生英文文献汇报化学化工PPT学习教案

1、会计学1研究生英文文献汇报化学化工研究生英文文献汇报化学化工2Literatures Source第1页/共21页1、Title and author2、AbstractPhase 4Phase 3Phase 2Phase 1Introduction 1、synthesis and characterization 2、LIB assembly 1、Results and Discussion 2、Conclusions 3、references第2页/共21页123 34 43 5Abstract IntroductionExperimental sectionResults and Dis

2、cussion Conclusions第3页/共21页5Abstract.第4页/共21页62、Introduction and Background Merits and applications of LIBsDrawbacks about anode materialsSilicon as a CandidatePreparation of Si nanotubes Introduction and Background第5页/共21页71.1 Merits and applications of LIBsRechargeable lithium-ion batteries (LIBs)

3、 are considered to be the most promising energy storage technology for next-generation portable electronic devices (e.g., laptops, cell phones, cameras) and for powering electric vehicles (EVs) or hybrid electric vehicles (HEVs) due to their long cycle life and high specific capacity. Introduction第6

4、页/共21页81.2 Drawbacks about anode materialsCurrent LIBs predominantly use graphite as anode material, which only has a theoretical capacity of around 372 mAh g1. Such a limited capacity significantly lags behind the rapidly growing energy demand for various electronic products. （补充：过剩容量、单位体积容量 ） Intr

5、oduction第7页/共21页9第8页/共21页10Introduction第9页/共21页11第10页/共21页122.1 Synthesis of Si nanotubes Fig. 1. (a) Schematic illustration for the synthesis of Si nanotubes反相胶团软模板法反相胶团软模板法联氨合镍为模板联氨合镍为模板可逆可逆第11页/共21页Experimental sectionBrig 58Cyclohexane 50 Si nanotube Mg+Argon660，3hStirring15 min +NiCl2+Hydrazine

6、 hydrateStirring15 min DEA、TEOSStirring15 mincentrifuIPA、H2OwashingSilica nanotubeSilica nanotubeHCletchingH2Owashing2.1 Synthesis of Si nanotubes 第12页/共21页14Working electrode active materials，60%acetylene black，30%binder (PVDF，10%）electrolyte1M LiPF6 dissolved in EC:DMC=4:6the counter and reference

7、 eletrodeA lithium pellet第13页/共21页15Experimental sectionThe morphology and crystallographic structureThe pore size and a BET surface areaElectrochemical performance SEM、TEM、SAED、XRDN2 adsorption and desorption measurements Land battery tester system第14页/共21页16Fig. 1. (b) SEM image and TEM image (ins

8、et) of silica nanotubes;(c) SEM image, (d) TEM image, and (e) SAED patterns of Si nanotubes.SiO2 纳米管：直径约15nm,长度约为50-200nm;Si 纳米管形貌类似金刚石结构，结晶良好。第15页/共21页17Results and DiscussionFig. 2. (a) XRD patterns and (b) nitrogen adsorption/desorption isotherm curves at 77 K and pore size distribution of the Si

9、 nanotubes (inset) SiO2：无定形结构：无定形结构Si：晶型：晶型氮吸附：中大孔径，氮吸附：中大孔径，单位质量体积单位质量体积BET面积面积第16页/共21页18Fig. 2. the first and second charge/discharge profiles for (c) silicon meshes 325, (d) Si nanotubes LIB anode at 0.5 C; 平台平台起始容量比较起始容量比较库伦效率比较库伦效率比较第17页/共21页19Results and DiscussionFig. 2cyclic performance and rate capability of (e) silicon meshes 325 and (f) Si nanotubes LIB anode at differ