Dissertation > Excellent graduate degree dissertation topics show

New Polymer Electrolytes for Lithium Ion Batteries

Author: DongXianGuo
Tutor: WangCunGuo
School: Qingdao University of Science and Technology
Course: Polymer Chemistry and Physics
Keywords: Lithium ion batteries Polymer electrolytes PMMA-VAc P(MA-AN-IALi)(PMAIL) IALi LiBOB Li5BOB
CLC: TM912
Type: Master's thesis
Year: 2006
Downloads: 135
Quote: 1
Read: Download Dissertation

Abstract


The researches of polymer electrolytes for Li-ion Batteries are summarized. Novel PMMA-VAc-based Gel Electrolyte cross-linked by N,N’-methylenebis-acr ylamide for lithium ion battery is prepared. As the network structure, the mechanical property of the gelled electrolyte is improved. The content of MMA, VA -c, N,N’- methylenebisacrylamide and DBP are optimized, and the conductivity is investigated. The conductivity reaches 1.21×10-4 S·cm-1 in the polymer electrolyte （PMMA: VAC=1:0.5） containing 0.05% N,N’-methylenebisacrylamide （mass fraction） in ethylene carbonate （EC）/dimethyl carbonate （DMC） at room temperature. The polymer lithium ion battery with gelled PMMA-VAc electrolyte exhibits good electrochemical and mechanical property when PMMA-VAc: DBP=1:0.75. A copolymer P（MA-AN-IALi）（ PMAIL） was synthesized by solution polymerization. It was made by solution casting, and the nor-solvent or extraction step was unnecessary in this process. A novel gelled polymer electrolyte based on PMAIL was obtained by soaking the polymer membrane in organic liquid electrolytes. The surface structure of the polymer film was characterized by SEM. The pores were well distributed in the surface of the membrane. The ionic conductivity of the polymer electrolyte was measured by the AC impedance method, it was about 1.89×10-4 S·cm-1 at room temperature. The test results display that the polymer electrolyte based on PMAIL was electrochemical stable and can be used in lithium ion batteries.Electrolytes play an important role in the study of lithium-ion battery. If we want to improve its conductivity, we should search for a new lithium salt as lithium-ion batteries. In this paper, I do some explorations and experiments in search for new lithium salts: itaconic acid react with LiOH or Li2CO3. In addition, we synthesized several electrolytes such as LiBOB and Li5BOB.

Related Dissertations

  1. First-Principles Studies of Blacl Phosphorus and LiMn2O4 as Electrode Material for Lithium Ion Batteries,TM912
  2. First-Principles Studies of Cathode Material LiMPO4 （M=Mn, Fe） of Lithium Ion Batteries,TM912
  3. Selection and Optimization of Film-Foring Additives for Lithium-Ion Battery,TM912
  4. Electrolyte used overcharge protection additives and LiBOB research,TM912.9
  5. Preparation and Properties of nano metal oxide,TB383.1
  6. The Preparation of Ni Doped SnO2 Nanostructures and Its Application in Li-ion Battery,TM914.4
  7. Study of LiBOB Electrolyte for Lithium Ion Battery,TM912.9
  8. Novel Energy Source Materials-Study on the Electerode Materials for Electrochemical Capacitor and Lithium Ion Battery,TM911.4
  9. Electrochemical Study of Poly(Vinylidene Fluoride-co-hexafluoropropane)-based Micro-porous Composite Polymer Electrolyte,O646
  10. The spinel LiMn_2O_4 Preparation and battery production technology and properties of,TM911
  11. Study on Performances of Intercalation/Deintercalation of Lithium Ions and Kinetics of Intercalation Process of Lithium Ions in Modified Natural Graphite,TM911
  12. Studies on the Cathode Materials for Lithium-ion Batteries Prepared by the Low-heating Solid-state Reaction Method and on Their Lithium-ion Inserting Properties,TM911
  13. Preparation and Properties and applications of lithium-ion battery anode material,TM911
  14. Research on Some Sb or Bi-Based Intermetallic Compounds as Anode Material of Li-ion Batteries,TM911
  15. Silane as a lithium -ion battery electrolyte additive,TM912
  16. Preparation and Study on Tin-based Oxide as Negative Material for Lithium Ion Batteries,TM912
  17. Modification for lithium ion batteries with graphite materials,TM911
  18. Synthesis and Electrochemical Performances of LiNixCoyMn1-x-yO2 for Lithium-Ion Battery Cathode Material,TM912
  19. Rice husk lithium ion battery anode materials,TM912
  20. Effect of Catalytic Heat Treatmeat on the Electrochemical Performance of Mesco-Carbon Microbeads as Anode Material for Lithium-Ion Batteries,TM912

CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Battery
© 2012 www.DissertationTopic.Net  Mobile