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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]

Journal Article · · Advanced Energy Materials
 [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)

Abstract 2D 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 challenge. Herein, the concentration of dispersion liquid under supercritical conditions is tuned to induce the CoSe crystal to grow along the graphene oxide (GO), and finally obtain the Tremella ‐like CoSe–reduced GO (rGO) hybrid. The nature of epitaxial growth leads to the formation of stable CSe bonds, which maintain a favorable conductive connection between CoSe and rGO as well as enhance the mechanical strength of active materials 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 sodium‐ion batteries and 769.6 mAh g −1 at 2 A g −1 after 500 cycles for lithium‐ion batteries). Moreover, the transmission X‐ray microscopy technique is first used to directly observe the Se segregation in cobalt selenide and it being suppressed by the CSe bonds.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; DE‐AC02‐76SF00515
OSTI ID:
1470710
Alternate ID(s):
OSTI ID: 1456283
Journal Information:
Advanced Energy Materials, Vol. 8, Issue 23; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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Cited By (6)

Freestanding N‐Doped Carbon Coated CuO Array Anode for Lithium‐Ion and Sodium‐Ion Batteries journal May 2019
Metal Chalcogenides: Paving the Way for High‐Performance Sodium/Potassium‐Ion Batteries journal October 2019
Cellular carbon-wrapped FeSe 2 nanocavities with ultrathin walls and multiple rooms for ion diffusion-confined ultrafast sodium storage journal January 2019
Carbon capsule confined Sb 2 Se 3 for fast Na + extraction in sodium-ion batteries journal January 2020
Carbon-coated CoSe 2 nanoparticles confined in N-doped carbon microboxes with enhanced sodium storage properties journal January 2019
ZIF-67-Derived CoSe/NC Composites as Anode Materials for Lithium-Ion Batteries journal December 2019

Figures / Tables (13)