All-Electrochemical Nanofabrication of Stacked Ternary Metal Sulfide/Graphene Electrodes for High-Performance Alkaline Batteries
Artikel i vetenskaplig tidskrift, 2022

Energy-storage materials can be assembled directly on the electrodes of a battery using electrochemical methods, this allowing sequential deposition, high structural control, and low cost. Here, a two-step approach combining electrophoretic deposition (EPD) and cathodic electrodeposition (CED) is demonstrated to fabricate multilayer hierarchical electrodes of reduced graphene oxide (rGO) and mixed transition metal sulfides (NiCoMnSx). The process is performed directly on conductive electrodes applying a small electric bias to electro-deposit rGO and NiCoMnSx in alternated cycles, yielding an ideal porous network and a continuous path for transport of ions and electrons. A fully rechargeable alkaline battery (RAB) assembled with such electrodes gives maximum energy density of 97.2 Wh kg−1 and maximum power density of 3.1 kW kg−1, calculated on the total mass of active materials, and outstanding cycling stability (retention 72% after 7000 charge/discharge cycles at 10 A g−1). When the total electrode mass of the cell is considered, the authors achieve an unprecedented gravimetric energy density of 68.5 Wh kg−1, sevenfold higher than that of typical commercial supercapacitors, higher than that of Ni/Cd or lead–acid Batteries and similar to Ni–MH Batteries. The approach can be used to assemble multilayer composite structures on arbitrary electrode shapes.

Författare

Jaime Sanchez Sanchez

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Instituto IMDEA Energía

Zhenyuan Xia

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)

Nagaraj Patil

Instituto IMDEA Energía

Rebecca Grieco

Instituto IMDEA Energía

Jinhua Sun

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Uta Klement

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Ren Qiu

Chalmers, Fysik, Mikrostrukturfysik

Meganne Christian

Istituto per la Microelettronica e Microsistemi

Fabiola Liscio

Istituto per la Microelettronica e Microsistemi

Vittorio Morandi

Istituto per la Microelettronica e Microsistemi

Rebeca Marcilla

Instituto IMDEA Energía

Vincenzo Palermo

Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Small

1613-6810 (ISSN) 1613-6829 (eISSN)

Vol. 18

Grafenkompositer för avancerad behandling av dricksvatten

VINNOVA (2019-05353), 2019-12-02 -- 2022-12-31.

Ämneskategorier

Materialteknik

Kemi

Styrkeområden

Energi

Materialvetenskap

Fundament

Grundläggande vetenskaper

DOI

10.1002/smll.202106403

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Senast uppdaterat

2024-07-17