Enabling Superior Electrochemical Properties for Highly Efficient Potassium Storage by Impregnating Ultrafine Sb Nanocrystals within Nanochannel-Containing Carbon Nanofibers
- 6 October 2019
- journal article
- research article
- Published by Wiley in Angewandte Chemie-International Edition
- Vol. 58 (41), 14578-14583
- https://doi.org/10.1002/anie.201908918
Abstract
Sb-based nanocomposites are attractive anode materials for batteries as they exhibit large theoretical capacity and impressive working voltage. However, tardy potassium ion diffusion characteristics, unstable Sb/electrolyte interphase, and huge volume variation pose a challenge, hindering their practical use for potassium-ion batteries (PIBs). Now, a simple robust strategy is presented for uniformly impregnating ultrasmall Sb nanocrystals within carbon nanofibers containing an array of hollow nanochannels (denoted u-Sb@CNFs), resolving the issues above and yielding high-performance PIBs. u-Sb@CNFs can be directly employed as an anode, thereby dispensing with the need for conductive additives and binders. Such a judiciously crafted u-Sb@CNF-based anode renders a set of intriguing electrochemical properties, representing large charge capacity, unprecedented cycling stability, and outstanding rate performance. A reversible capacity of 225 mAh g(-1) is retained after 2000 cycles at 1 A g(-1).Keywords
Funding Information
- National Natural Science Foundation of China (51577094)
This publication has 48 references indexed in Scilit:
- Entrapment of Polysulfides by a Black‐Phosphorus‐Modified Separator for Lithium–Sulfur BatteriesAdvanced Materials, 2016
- Flexible Aqueous Lithium‐Ion Battery with High Safety and Large Volumetric Energy DensityAngewandte Chemie, 2016
- Flexible Aqueous Lithium‐Ion Battery with High Safety and Large Volumetric Energy DensityAngewandte Chemie-International Edition, 2016
- Double‐Walled Sb@TiO2−x Nanotubes as a Superior High‐Rate and Ultralong‐Lifespan Anode Material for Na‐Ion and Li‐Ion BatteriesAdvanced Materials, 2016
- Hard Carbon Microspheres: Potassium‐Ion Anode Versus Sodium‐Ion AnodeAdvanced Energy Materials, 2015
- Tin Nanodots Encapsulated in Porous Nitrogen‐Doped Carbon Nanofibers as a Free‐Standing Anode for Advanced Sodium‐Ion BatteriesAdvanced Materials, 2015
- Carbon Electrodes for K-Ion BatteriesJournal of the American Chemical Society, 2015
- Controlling SEI Formation on SnSb‐Porous Carbon Nanofibers for Improved Na Ion StorageAdvanced Materials, 2014
- Electrospun Sb/C Fibers for a Stable and Fast Sodium-Ion Battery AnodeACS Nano, 2013
- High-rate electrochemical energy storage through Li+ intercalation pseudocapacitanceNature Materials, 2013