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Published on: February 5, 2019
Graphene-Supported Naphthalene-Based Polyimide Composite as a High-Performance Sodium Storage Cathode.
Ronghua Zeng1,2, Yiwen Wu1, Suhui Qian1
1School of Chemistry, National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Laboratory of ETESPG (GHEI), South China Normal University, Guangzhou 510006, China.
A new naphthalene polyimide derivative composite with graphene shows promise for sodium-ion batteries (SIBs). This advanced material offers high capacity and stability, overcoming limitations of previous organic electrode materials.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Electroactive acid anhydrides with multicarbonyls are promising for energy storage due to high capacity and environmental friendliness.
- However, poor electrical conductivity and electrolyte dissolution limit their cycling and rate performance in batteries.
Purpose of the Study:
- To develop a high-performance organic electrode material for sodium-ion batteries (SIBs).
- To address the limitations of low conductivity and poor stability in existing organic electrode materials.
Main Methods:
- Synthesis of a naphthalene polyimide derivative (NPI) via condensation polymerization.
- Fabrication of a graphene composite (NPI-G) using in situ polymerization.
- Electrochemical testing of NPI-G as a cathode material for SIBs.
Main Results:
- The NPI-G composite demonstrated high reversible capacity and excellent cycling stability.
- Significant improvements in rate capability were observed for the NPI-G cathode.
- Enhanced electrical conductivity and structural stability were attributed to graphene integration and π-π stacking.
Conclusions:
- The NPI-G composite represents a next-generation organic electrode material for high-performance SIBs.
- This work provides insights into designing and screening advanced organic materials for electrochemical energy storage.
