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Watcharit Atthawong. Capacity and capacity retention improvement of Li2MnSiO4 cathode for lithium ion battery. Master's Degree(Advanced and Sustainable Environmental Engineering). Kasetsart University. Office of the University Library. : Kasetsart University, 2018.
Capacity and capacity retention improvement of Li2MnSiO4 cathode for lithium ion battery
Name: Watcharit Atthawong
Classification :.LCCS: TK2945.L58
LCSH:
Lithium ion batteries
LCSH:
Cathodes
LCSH:
Anodes
LCSH:
Electrolytes
Abstract:
Lithium ion battery becomes a suitable choice for portable energy source in present days. Cathode materials in Lithium ion battery have been interested for improving working voltage and battery capacity. Recently, orthosilicate compound Li2MSiO4 (M = Mn, Fe, Ni, etc.) has been interested as new cathode materials due high working voltage up to 4.8 V. Among orthosilicate families, Li2MnSiO4 has gained much interested owing to its high theoretical capacity (~333 mA.h.g-1 ) leading more than one lithium ion extraction per formula unit. However, Li2MnSiO4 has capacity fading problem along cycling. In order to improve this issue, doping of cation into Mn-site and Si-site is one of the possible methods to stabilize the structure. In this study, the carbon coated on Li2MnSiO4 surface (Li2MnSiO4/C) has been successfully synthesized by sol ̶ gel method and sucrose was introduced as carbon source. Ga2N3O9.xH2O has been used as a dopants for Ga-doping into Mn-site and Si-site of Li2MnSiO4/C for comparing the phase purity and electrochemical performance. The structure of orthorhombic Li2MnSiO4/C with Pmn21 space group was obtained. The electrochemical results showed that undoped Li2MnSiO4/C obtained first discharge capacity as high as 200 mAh g -1 at 0.05C but capacity retention was only 37% (~75 mAh g -1 ) after 30 cycles. For the Ga-doped synthesized Li2MnSiO4/C, 5% Ga-doping into Mn-site led higher discharge capacity than Si-site but Si-site-doped contributed the highest capacity retention. However, Ga-doped Li2MnSiO4/C could not contribute high discharge capacity as much as the undoped Li2MnSiO4/C because Ga-doping introduced the structural distortion and the appearance of impurity phases.
Kasetsart University. Office of the University Library
Address:
Bangkok
Email:
tdckulib@ku.ac.th
Name: Maythee Saisriyoot
Role:
Thesis Advisor
Name: Pimpa Limthongkul
Role:
Thesis CO-Advisor
Created:
2018
Modified:
2025-07-08
Issued:
2025-07-08
วิทยานิพนธ์/Thesis
application/pdf
URL: https://www.lib.ku.ac.th/KUthesis/2561/watcharit-att-all.pdf
CallNumber:
TK2945.L58 .W38
eng
DegreeName: Master of Engineering
Level: Master's Degree
Grantor: Kasetsart University
©copyrights Kasetsart University
RightsAccess:
ใช้เวลา
0.037156 วินาที
Watcharit Atthawong
| Title | Contributor | Type |
|---|---|---|
| Capacity and capacity retention improvement of Li2MnSiO4 cathode for lithium ion battery
มหาวิทยาลัยเกษตรศาสตร์ Watcharit Atthawong | Maythee Saisriyoot | วิทยานิพนธ์/Thesis |
Maythee Saisriyoot
| Title | Creator | Type and Date Create |
|---|---|---|
| Capacity and capacity retention improvement of Li2MnSiO4 cathode for lithium ion battery
มหาวิทยาลัยเกษตรศาสตร์ Maythee Saisriyoot | Watcharit Atthawong | วิทยานิพนธ์/Thesis |
| Long-term operation and durability of continuous upflow bio-filter circuit microbial fuel cells for electricity generation and COD removal
มหาวิทยาลัยเกษตรศาสตร์ Maythee Saisriyoot ;Korakot Sombatmankhong | Saowalak Boonpeng | วิทยานิพนธ์/Thesis |
Pimpa Limthongkul
| Title | Creator | Type and Date Create |
|---|---|---|
| The development of novel catalyst for methanol steam reforming
มหาวิทยาลัยธรรมศาสตร์ Pisanu Toochinda;Pimpa Limthongkul | Suparoek Henpraserttae | วิทยานิพนธ์/Thesis |
| Development of low cost solid sorbent using agricultural wastes and their derivatives for CO2 sequestration
มหาวิทยาลัยธรรมศาสตร์ Pisanu Toochinda;Pimpa Limthongkul | Thawatchai Jarunchart | วิทยานิพนธ์/Thesis |
| Investigation of the effect of microstructural characteristics on the electrochemical properties of 0.5Li2MnO30.5LiCoO2 cathode meterial for lithium ion batteries
มหาวิทยาลัยขอนแก่น Nonglak Meethong;Pimpa Limthongkul | Songyoot Kaewmala | วิทยานิพนธ์/Thesis |
| Synthesis and property study of Ni-based cathod for IT-SOFCs
จุฬาลงกรณ์มหาวิทยาลัย ;Sujitra Wongkasemjit;Pimpa Limthongkul | Thitirat Inprasit | วิทยานิพนธ์/Thesis |