Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/69933
Title: Carbonyl compounds as cathode materials for lithium-ion batteries
Authors: Choo, Kenneth Wei Jie
Keywords: DRNTU::Engineering::Materials::Energy materials
Issue Date: 2017
Abstract: Organic compounds as active electrode materials are known for their low cost, versatility, renewability and eco-friendliness. Carbonyl compounds with large aromatic structure and heteroatoms have proven to achieve long cycling stability and high specific capacity. In this report, a novel carbonyl compound with heteroatoms and large aromatic structures (PDA-4N) was investigated as cathode material for lithium-ion battery. Electrochemical properties of PDA-4N of different weight ratio and NTCDA were evaluated and discussed. The active materials were well blended with CNT additive and PVDF binder before establishing a coin-type cell configuration for analyses on cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), rate performance, cycling performance and charge-discharge capacity profile. Investigations on electrochemical performances of PDA-4N were conducted between 2.0 and 3.9V vs. Li/Li+. PDA-4N demonstrated a reasonably high initial specific capacity of 116.3 mAh g-1 and rate performance up to current rate of 7.92C. PDA-4N also exhibited a stable cycling performance of 50 cycles with reasonable capacity retention of 78.7% of its theoretical capacity and a high coulombic efficiency of 99.86% on average. However, EIS measurement revealed that PDA-4N possessed slow charge transfer capability and poor electric response. Further studies on CNT additive and PVDF binder ratio illustrated a positive effect on cycling stability of PDA-4N. This study reveals that carbonyl compound with heteroatoms and large aromatic structures could potentially be utilised as organic cathode material for rechargeable lithium-ion battery and effective modifications can be made to further enhance the electrochemical properties.
URI: http://hdl.handle.net/10356/69933
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MSE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
FYP Report_Kenneth Choo_Submit.pdf
  Restricted Access
1.72 MBAdobe PDFView/Open

Page view(s) 50

153
checked on Oct 24, 2020

Download(s) 50

24
checked on Oct 24, 2020

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.