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Title: Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like 2D Chalcogenide Battery Anode [Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like Two-Dimensional Chalcogenide Battery Anode]

Two-dimensional cobalt selenide based on conversion reaction has attracted much attention due to its open layered structure and high specific capacity. However, effectively suppressing the fast capacity fade caused by the irreversible Se dissolution and serious volume change during the cycling process is still a challenges. Herein, we tune the concentration of dispersion liquid under supercritical condition to induce the CoSe crystal to grow along the graphene oxide (GO), and finally obtain the Tremella-like CoSe-rGO hybrid. The nature of epitaxial growth leads to the formation of stable C–Se bonds, which maintains favorable conductive connection between CoSe and reduced GO (rGO) as well as enhances the mechanical strength of active material to suppress Se dissolution and volume expansion during Na/Li intercalation and deintercalation. The unique microstructural merits of the hybrid result in superior sodium/lithium storage performance (400.8 mAh g -1 at 1 A g -1 after 100 cycles for NIBs and 769.6 mAh g -1 at 2 A g -1 after 500 cycles for LIBs). Moreover, the transmission X-ray microscopy technique is firstly used to directly observe the Se segregation in cobalt selenide and it being suppressed by the C–Se bonds.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [1] ;  [1] ;  [1] ;  [4] ;  [2] ; ORCiD logo [4]
  1. Beijing Institute of Technology, Beijing (P. R. China)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States); Chinese Academy of Sciences (CAS), Beijing (P. R. China)
  4. Beijing Institute of Technology, Beijing (P. R. China); Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing (P. R. China)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 23; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; carbon–selenium bonds; cobalt selenide; lithium‐ion batteries; Se dissolution; sodium-ion batteries
OSTI Identifier:
1470710
Alternate Identifier(s):
OSTI ID: 1456283

Li, Yu, Xu, Yahong, Wang, Zhaohua, Bai, Ying, Zhang, Kai, Dong, Ruiqi, Gao, Yaning, Ni, Qiao, Wu, Feng, Liu, Yijin, and Wu, Chuan. Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like 2D Chalcogenide Battery Anode [Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like Two-Dimensional Chalcogenide Battery Anode]. United States: N. p., Web. doi:10.1002/aenm.201800927.
Li, Yu, Xu, Yahong, Wang, Zhaohua, Bai, Ying, Zhang, Kai, Dong, Ruiqi, Gao, Yaning, Ni, Qiao, Wu, Feng, Liu, Yijin, & Wu, Chuan. Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like 2D Chalcogenide Battery Anode [Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like Two-Dimensional Chalcogenide Battery Anode]. United States. doi:10.1002/aenm.201800927.
Li, Yu, Xu, Yahong, Wang, Zhaohua, Bai, Ying, Zhang, Kai, Dong, Ruiqi, Gao, Yaning, Ni, Qiao, Wu, Feng, Liu, Yijin, and Wu, Chuan. 2018. "Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like 2D Chalcogenide Battery Anode [Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like Two-Dimensional Chalcogenide Battery Anode]". United States. doi:10.1002/aenm.201800927.
@article{osti_1470710,
title = {Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like 2D Chalcogenide Battery Anode [Stable Carbon-Selenium Bonds for Enhanced Performance in Tremella-Like Two-Dimensional Chalcogenide Battery Anode]},
author = {Li, Yu and Xu, Yahong and Wang, Zhaohua and Bai, Ying and Zhang, Kai and Dong, Ruiqi and Gao, Yaning and Ni, Qiao and Wu, Feng and Liu, Yijin and Wu, Chuan},
abstractNote = {Two-dimensional cobalt selenide based on conversion reaction has attracted much attention due to its open layered structure and high specific capacity. However, effectively suppressing the fast capacity fade caused by the irreversible Se dissolution and serious volume change during the cycling process is still a challenges. Herein, we tune the concentration of dispersion liquid under supercritical condition to induce the CoSe crystal to grow along the graphene oxide (GO), and finally obtain the Tremella-like CoSe-rGO hybrid. The nature of epitaxial growth leads to the formation of stable C–Se bonds, which maintains favorable conductive connection between CoSe and reduced GO (rGO) as well as enhances the mechanical strength of active material to suppress Se dissolution and volume expansion during Na/Li intercalation and deintercalation. The unique microstructural merits of the hybrid result in superior sodium/lithium storage performance (400.8 mAh g-1 at 1 A g-1 after 100 cycles for NIBs and 769.6 mAh g-1 at 2 A g-1 after 500 cycles for LIBs). Moreover, the transmission X-ray microscopy technique is firstly used to directly observe the Se segregation in cobalt selenide and it being suppressed by the C–Se bonds.},
doi = {10.1002/aenm.201800927},
journal = {Advanced Energy Materials},
number = 23,
volume = 8,
place = {United States},
year = {2018},
month = {6}
}