Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/ijms23031457
Keywords
rechargeable Li-ion aqueous battery; conductive polymers; PANI core-shell coating; biomimetic electrode
Funding
- THETA program of the Technology Agency of the Czech Republic [TK03030157]
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The study improved the electrochemical parameters of a biomimetic cathode based on lithium manganese oxide and carbon nanotubes using polyaniline and graphene, leading to enhanced performance and stability for rechargeable Lithium-ion aqueous batteries.
The electrochemical parameters of a novel binder-free self-standing biomimetic cathode based on lithium manganese oxide (LMO) and carbon nanotubes (CNT) for rechargeable Lithium-ion aqueous batteries (ReLIAB) are improved using polyaniline (PANI) core-shell in situ polymerization and graphene (Gr). The fabricated cathode material exhibits the so-called tectonic plate island bridge biomimetic structure. This constitution is created by combining three components as shown by a SEM and a TEM analysis: the Gr substrates support an entangled matrix of conductive CNT which connect island of non-conductive inorganic material composed of LMO. The typical spinel structure of the LMO remains unchanged after modifying the basic structure with Gr and PANI due to a simplified hydrothermal method used for synthesis. The Gr and PANI core-shell coating improves the electric conductivity from 0.0025 S/cm up to 1 S/cm. The electrochemical performances of the LMO/CNT-Gr/PANI composite electrode are optimized up to 136 mA h g(-1) compared to 111 mA h g(-1) of the LMO/CNT. Besides that, the new electrode shows good cycling stability after 200 galvanostatic charging/discharging cycles, making this structure a future candidate for cathode materials for ReLIAB.
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