Ultrathin Cobaltosic Oxide Nanosheets as an Effective Sulfur Encapsulation Matrix with Strong Affinity Toward Polysulfides

Hongqiang Wang; Tengfei Zhou; Dan Li; Hong Gao; Guoping Gao; Aijun Du; Huakun Liu; Zaiping Guo

doi:10.1021/acsami.6b07961

Ultrathin Cobaltosic Oxide Nanosheets as an Effective Sulfur Encapsulation Matrix with Strong Affinity Toward Polysulfides

Hongqiang Wang
, Tengfei Zhou
, Dan Li
, Hong Gao
, Guoping Gao
, Aijun Du
, Huakun Liu
, Zaiping Guo^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

64 Citations (Scopus)

Abstract

Two-dimensional ultrathin cobaltosic oxide nanosheets with numerous geometrical holes were synthesized by the hydrothermal method, and further used as an effective encapsulation matrix for sulfur and polysulfides in lithium-sulfur batteries. The cobaltosic oxide/sulfur nanosheet composite electrode exhibits high Coulombic efficiency (99%), a suppressed shuttle effect, and a reversible capacity of 656 mA h g^-1 at 0.2 C after 200 cycles, with small capacity fading of 0.219% per cycle, whereas its carbon-sulfur electrode counterpart only retains a capacity of 386 mA h g^-1 after 100 cycles. The improved performance is attributed to the strong chemical interaction between polysulfides and cobaltosic oxide, and its facile ionic transport and enhanced reaction kinetics, which can effectively control the diffusion of polysulfides and keep them within the cathode region, leading to good electrochemical stability. © 2016 American Chemical Society.

Original language	English
Pages (from-to)	4320-4325
Journal	ACS Applied Materials and Interfaces
Volume	9
Issue number	5
DOIs	https://doi.org/10.1021/acsami.6b07961
Publication status	Published - 8 Feb 2017
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was supported by an Australian Research Council (ARC) Discovery project (DP1094261). Furthermore, the authors are grateful to Dr. Tania Silver for critical reading of the manuscript.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

affinity to polysulfides
cobaltosic oxide
DFT calculations
encapsulation matrix
lithium-sulfur battery
ultrathin nanosheet

Access Output

10.1021/acsami.6b07961

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{944991c841504cc8b4075f7194b9e506,

title = "Ultrathin Cobaltosic Oxide Nanosheets as an Effective Sulfur Encapsulation Matrix with Strong Affinity Toward Polysulfides",

abstract = "Two-dimensional ultrathin cobaltosic oxide nanosheets with numerous geometrical holes were synthesized by the hydrothermal method, and further used as an effective encapsulation matrix for sulfur and polysulfides in lithium-sulfur batteries. The cobaltosic oxide/sulfur nanosheet composite electrode exhibits high Coulombic efficiency (99\%), a suppressed shuttle effect, and a reversible capacity of 656 mA h g-1 at 0.2 C after 200 cycles, with small capacity fading of 0.219\% per cycle, whereas its carbon-sulfur electrode counterpart only retains a capacity of 386 mA h g-1 after 100 cycles. The improved performance is attributed to the strong chemical interaction between polysulfides and cobaltosic oxide, and its facile ionic transport and enhanced reaction kinetics, which can effectively control the diffusion of polysulfides and keep them within the cathode region, leading to good electrochemical stability. {\textcopyright} 2016 American Chemical Society.",

keywords = "affinity to polysulfides, cobaltosic oxide, DFT calculations, encapsulation matrix, lithium-sulfur battery, ultrathin nanosheet",

author = "Hongqiang Wang and Tengfei Zhou and Dan Li and Hong Gao and Guoping Gao and Aijun Du and Huakun Liu and Zaiping Guo",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2017",

month = feb,

day = "8",

doi = "10.1021/acsami.6b07961",

language = "English",

volume = "9",

pages = "4320--4325",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

T1 - Ultrathin Cobaltosic Oxide Nanosheets as an Effective Sulfur Encapsulation Matrix with Strong Affinity Toward Polysulfides

AU - Wang, Hongqiang

AU - Zhou, Tengfei

AU - Li, Dan

AU - Gao, Hong

AU - Gao, Guoping

AU - Du, Aijun

AU - Liu, Huakun

AU - Guo, Zaiping

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2017/2/8

Y1 - 2017/2/8

N2 - Two-dimensional ultrathin cobaltosic oxide nanosheets with numerous geometrical holes were synthesized by the hydrothermal method, and further used as an effective encapsulation matrix for sulfur and polysulfides in lithium-sulfur batteries. The cobaltosic oxide/sulfur nanosheet composite electrode exhibits high Coulombic efficiency (99%), a suppressed shuttle effect, and a reversible capacity of 656 mA h g-1 at 0.2 C after 200 cycles, with small capacity fading of 0.219% per cycle, whereas its carbon-sulfur electrode counterpart only retains a capacity of 386 mA h g-1 after 100 cycles. The improved performance is attributed to the strong chemical interaction between polysulfides and cobaltosic oxide, and its facile ionic transport and enhanced reaction kinetics, which can effectively control the diffusion of polysulfides and keep them within the cathode region, leading to good electrochemical stability. © 2016 American Chemical Society.

AB - Two-dimensional ultrathin cobaltosic oxide nanosheets with numerous geometrical holes were synthesized by the hydrothermal method, and further used as an effective encapsulation matrix for sulfur and polysulfides in lithium-sulfur batteries. The cobaltosic oxide/sulfur nanosheet composite electrode exhibits high Coulombic efficiency (99%), a suppressed shuttle effect, and a reversible capacity of 656 mA h g-1 at 0.2 C after 200 cycles, with small capacity fading of 0.219% per cycle, whereas its carbon-sulfur electrode counterpart only retains a capacity of 386 mA h g-1 after 100 cycles. The improved performance is attributed to the strong chemical interaction between polysulfides and cobaltosic oxide, and its facile ionic transport and enhanced reaction kinetics, which can effectively control the diffusion of polysulfides and keep them within the cathode region, leading to good electrochemical stability. © 2016 American Chemical Society.

KW - affinity to polysulfides

KW - cobaltosic oxide

KW - DFT calculations

KW - encapsulation matrix

KW - lithium-sulfur battery

KW - ultrathin nanosheet

UR - https://www.scopus.com/pages/publications/85012016449

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85012016449&origin=recordpage

U2 - 10.1021/acsami.6b07961

DO - 10.1021/acsami.6b07961

M3 - RGC 21 - Publication in refereed journal

C2 - 27574872

SN - 1944-8244

VL - 9

SP - 4320

EP - 4325

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 5

ER -

Ultrathin Cobaltosic Oxide Nanosheets as an Effective Sulfur Encapsulation Matrix with Strong Affinity Toward Polysulfides

Abstract

Bibliographical note

Funding

UN SDGs

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this