Rationally-Designed Configuration of Directly-Coated Ni3S2/Ni Electrode by RGO Providing Superior Sodium Storage
- China University of Geosciences (Beijing)
- Tianjin University
- Xi'an University of Technology
- Wuhan University of Technology
- Tianjin Normal University
- BATTELLE (PACIFIC NW LAB)
Designing nanocomposite materials is an effective approach for enhancing the performance of sodium-ion batteries (SIBs), and understanding the synergy among components is critically important for new, better materials design. Herein, a directly reduced graphene oxide (RGO) decorated anode electrode was designed and tested for SIBs, in which uniform RGO coating onto the Ni3S2/Ni electrode was realized using facile hydrothermal reactions. The results indicate that the RGO/Ni3S2/Ni electrode delivers a high reversible specific capacity of 448.6 mAh g-1, high capacity retention of 96.5% after 100 cycles, and excellent rate capability of 263.1 mAh g-1 at 800 mA g-1. Compared with the Ni3S2/Ni electrode, the improved performance of the RGO/Ni3S2/Ni electrode benefits from RGO-promoted displacement reaction of Ni3S2 with sodium. DFT calculations reveal that the RGO layer can significantly improve the electron mobility of the RGO/Ni3S2 + Na structure, and the hybrid interaction between the C-p state of RGO and the Ni-p, Ni-d, and S-p states of Ni3S2 is the major reason for why RGO can improve the electrical transport properties.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1763025
- Report Number(s):
- PNNL-SA-132759
- Journal Information:
- Carbon, Journal Name: Carbon Vol. 133
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rationally-designed configuration of directly-coated Ni3S2/Ni electrode by RGO providing superior sodium storage
Sacrificial template synthesis of hollow C@MoS2@PPy nanocomposites as anodes for enhanced sodium storage performance
Journal Article
·
Tue Feb 27 19:00:00 EST 2018
· Carbon
·
OSTI ID:1423327
Sacrificial template synthesis of hollow C@MoS2@PPy nanocomposites as anodes for enhanced sodium storage performance
Journal Article
·
Fri Mar 22 20:00:00 EDT 2019
· Nano Energy
·
OSTI ID:1523650