Boosting Potassium Storage Performance of the Cu2S Anode via Morphology Engineering and Electrolyte Chemistry
Top Cited Papers
- 24 April 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 14 (5), 6024-6033
- https://doi.org/10.1021/acsnano.0c01681
Abstract
Transition metal sulfides (TMSs) have been demonstrated as attractive anodes for potassium-ion batteries (KIBs) due to the high capacity, abundant resource and excellent redox reversibility. Unfortunately, practical implementation of TMSs to KIBs is still hindered by the unsatisfactory cyclability and rate performance which result from the vast volume variation during charge/discharge processes. Herein, uniform nitrogen-doped carbon coated Cu2S hollow nano-cube ([email protected]) is designed as an anode material for KIB, which displays an outstanding cycle performance (317 mAh g-1 after 1200 cycles at 1 A g-1) and excellent rate capacity (257 mAh g−1 at 6 A g-1) in half-cell. The hollow nanosized structure can both shorten the diffusion length of potassium ions/ electrons and buffer the volume expansion upon cycling. Besides, the high concentration electrolyte is beneficial to form the stable solid electrolyte interphase (SEI) film, reducing the interface impedance and enhancing the cycling stability. Ex-situ transmission electron microscopy (TEM) and ex-situ X-ray diffraction (XRD) reveal the reaction mechanism of [email protected]Keywords
Funding Information
- Ministry of Education of the People's Republic of China (WK2060140026)
- Ministry of Science and Technology of the People's Republic of China (2018YFB0905400)
- National Natural Science Foundation of China (51872277, 51925207, U1910210)
- DNL Cooperation Fund, CAS (DNL180310)
This publication has 64 references indexed in Scilit:
- Carbon nanotube-stabilized Co9S8 dual-shell hollow spheres for high-performance K-ion storageChemical Communications, 2018
- Boosting potassium-ion batteries by few-layered composite anodes prepared via solution-triggered one-step shear exfoliationNature Communications, 2018
- Rational design of metal organic framework-derived FeS2 hollow nanocages@reduced graphene oxide for K-ion storageNanoscale, 2018
- Sulfur/Oxygen Codoped Porous Hard Carbon Microspheres for High‐Performance Potassium‐Ion BatteriesAdvanced Energy Materials, 2018
- Enhanced Capacity and Rate Capability of Nitrogen/Oxygen Dual‐Doped Hard Carbon in Capacitive Potassium‐Ion StorageAdvanced Materials, 2017
- An Initial Review of the Status of Electrode Materials for Potassium‐Ion BatteriesAdvanced Energy Materials, 2017
- High‐Capacity Aqueous Potassium‐Ion Batteries for Large‐Scale Energy StorageAdvanced Materials, 2016
- Electrochemical Intercalation of Potassium into GraphiteAdvanced Functional Materials, 2016
- Potassium Ion Batteries with Graphitic MaterialsNano Letters, 2015
- Cobalt sulfide nanosheets coated on NiCo2S4 nanotube arrays as electrode materials for high-performance supercapacitorsJournal of Materials Chemistry A, 2015