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.
practical energy and power density
lithium-sulfur batteries
graphene
surface functionalization
electrolyte lean condition
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)
Vol. 17 17 20072422D-kompositforskning vid Chalmers
Stiftelsen Chalmers tekniska högskola (SC 2017-0099), 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