Synthesis of High Surface Area α-K y MnO 2 Nanoneedles Using Extract of Broccoli as Bioactive Reducing Agent and Application in Lithium Battery - Sorbonne Université
Journal Articles Materials Year : 2020

Synthesis of High Surface Area α-K y MnO 2 Nanoneedles Using Extract of Broccoli as Bioactive Reducing Agent and Application in Lithium Battery

Abstract

With the aim to reduce the entire cost of lithium-ion batteries and to diminish the environmental impact, the extract of broccoli is used as a strong benign reducing agent for potassium permanganate to synthesize α-K y MnO 2 cathode material with pure nanostructured phase. Material purity is confirmed by X-ray powder diffraction and thermogravimetric analyses. Images of transmission electron microscopy show samples with a spider-net shape consisting of very fine interconnected nanoneedles. The nanostructure is characterized by crystallite of 4.4 nm in diameter and large surface area of 160.7 m 2 g −1. The material delivers an initial capacity of 211 mAh g −1 with high Coulombic efficiency of 99% and 82% capacity retention after 100 cycles. Thus, α-K y MnO 2 synthesized via a green process exhibits very promising electrochemical performance in terms of initial capacity, cycling stability and rate capability.
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Dates and versions

hal-02617509 , version 1 (25-05-2020)

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Ahmed M Hashem, Hanaa M Abuzeid, Martin Winter, Jie Li, Christian Julien. Synthesis of High Surface Area α-K y MnO 2 Nanoneedles Using Extract of Broccoli as Bioactive Reducing Agent and Application in Lithium Battery. Materials, 2020, 13 (6), pp.1269. ⟨10.3390/ma13061269⟩. ⟨hal-02617509⟩
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