Green synthesis of honeycomb-like CoNiMo-layered double hydroxides derived from metal glycerolates as sacrificial template for high-performance supercapacitor

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Author list: Kubendhiran, S.; Saukani, M.; Kongphichphan, N.; Chen, H.-M.; Husain, S.; Kongvarhodom, C.; Wu, Y.-F.; Lin, L.-Y.

Publisher: Elsevier

Publication year: 2025

Journal: Journal of Power Sources (0378-7753)

Volume number: 658

Start page: 238362

ISBN: 444894810

ISSN: 0378-7753

eISSN: 1873-2755

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-105015148924&doi=10.1016%2Fj.jpowsour.2025.238362&partnerID=40&md5=b72896ad3ccd7bd17968b91225559f21

Languages: English-Great Britain (EN-GB)

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Abstract

In this study, honeycomb-like cobalt nickel molybdenum LDHs (CoNiMo-LDHs) are synthesized via a green magnetic stirring method, utilizing NiCo-glycerolate spheres prepared through a solvothermal process as sacrificial templates. The influence of stirring time and molybdenum concentration on the structural, morphological, and electrochemical properties of CoNiMo-LDHs is systematically investigated. The reaction time has a minimal influence on morphology and electrochemical behavior, while increasing the Mo concentration increases charge transfer resistances without altering morphology. Under optimized conditions (stirring for 4.5 h with 5 mM Mo ions), CoNiMo-LDH exhibits a high specific capacitance of 1059 F/g at 3 A/g. Moreover, an asymmetric supercapacitor assembled with optimal CoNiMo-LDH and graphene delivers an energy density of 32.1 Wh/kg at a power density of 350 W/kg and retains 92.6% of the initial capacitance after 10,000 cycles. These findings highlight the potential of rationally designed trimetallic CoNiMo-LDHs synthesized via an eco-friendly route as a durable and efficient material for advanced energy applications. © 2025 Elsevier B.V.

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