Critical Role of Functional Groups Containing N, S, and O on Graphene Surface for Stable and Fast Charging Li‐S Batteries
Artikel i vetenskaplig tidskrift, 2021

Lithium‐sulfur (Li‐S) batteries are considered one of the most promising energy storage technologies, possibly replacing the state‐of‐the‐art lithium‐ion (Li‐ion) batteries owing to their high energy density, low cost, and eco‐compatibility. However, the migration of high‐order lithium polysulfides (LiPs) to the lithium surface and the sluggish electrochemical kinetics pose challenges to their commercialization. The interactions between the cathode and LiPs can be enhanced by the doping of the carbon host with heteroatoms, however with relatively low doping content (<10%) in the bulk of the carbon, which can hardly interact with LiPs at the host surface. In this study, the grafting of versatile functional groups with designable properties (e.g., catalytic effects) directly on the surface of the carbon host is proposed to enhance interactions with LiPs. As model systems, benzene groups containing N/O and S/O atoms are vertically grafted and uniformly distributed on the surface of expanded reduced graphene oxide, fostering a stable interface between the cathode and LiPs. The combination of experiments and density functional theory calculations demonstrate improvements in chemical interactions between graphene and LiPs, with an enhancement in the electrochemical kinetics, power, and energy densities.

Författare

Jinhua Sun

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Jang Yeon Hwang

Chonnam National University

Piotr Jankowski

Wojskowa Akademia Techniczna

Danmarks Tekniske Universitet (DTU)

Linhong Xiao

Umeå universitet

Jaime Sanchez Sanchez

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Zhenyuan Xia

Chalmers, Industri- och materialvetenskap, Material och tillverkning

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

Suyeong Lee

Chonnam National University

Alexandr V. Talyzin

Umeå universitet

Aleksandar Matic

Chalmers, Fysik, Materialfysik

Vincenzo Palermo

Chalmers, Industri- och materialvetenskap, Material och tillverkning

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

Yang-Kook Sun

Hanyang University

Marco Agostini

Chalmers, Fysik, Materialfysik

Small

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

2007242-

2D-kompositforskning vid Chalmers

Stiftelsen Chalmers tekniska högskola, 2018-01-01 -- 2020-12-31.

Ämneskategorier

Fysikalisk kemi

Biomedicinsk laboratorievetenskap/teknologi

Cancer och onkologi

DOI

10.1002/smll.202007242

Relaterade dataset

Critical Role of Functional Groups Containing N, S, and O on Graphene Surface for Stable and Fast Charging Li‐S Batteries [dataset]

DOI: 10.1002/smll.202007242

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Senast uppdaterat

2021-04-01