Journal article
MXene‐Bonded Flexible Hard Carbon Film as Anode for Stable Na/K‐Ion Storage
Advanced functional materials, v 29(51), 1906282
19 Dec 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Hard carbon (HC) is a promising anode material for sodium‐ion batteries (SIBs) and potassium‐ion batteries (PIBs), but the volume change during the insertion/extraction of Na+ or K+ limits the cycle life, especially for PIBs due to the large ion size of K+. Moreover, the conventional anodes fabricated through the coating method cannot satisfy the requirement of flexible devices. Here, it is shown that 2D carbide flakes of Ti3C2Tx MXene can be used as multifunctional conductive binders for flexible HC electrodes. The use of MXene nanosheets eliminates the need for all the electrochemically inactive components in the conventional polyvinylidene fluoride–bonded HC electrode, including polymer binders, conductive additives, and current collectors. In MXene‐bonded HC electrodes, conductive and hydrophilic MXene 2D nanosheets construct a 3D network, which can effectively stabilize the electrode structure and accommodate the volume expansion of HC during the charge/discharge process, leading to an enhanced electrode capacity and excellent cycle performance as anodes for both SIBs and PIBs. Benefiting from the 3D conductive network, the MXene‐bonded HC film electrodes also present improved rate capability, indicating MXene is a very promising multifunctional binder for next‐generation flexible secondary rechargeable batteries.
A simple but powerful strategy is proposed to fabricate flexible hard carbon (HC) electrodes for sodium‐ and potassium‐ion batteries by using Ti3C2Tx MXene as a multifunctional conductive binder. HC particles are embedded in the three‐dimensional conductive MXene framework, which can effectively stabilize the electrode structure and facilitate transport of ions and electrons, leading to excellent cycle and rate capability.
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Details
- Title
- MXene‐Bonded Flexible Hard Carbon Film as Anode for Stable Na/K‐Ion Storage
- Creators
- Ning Sun - Beijing University of Chemical TechnologyQizhen Zhu - Beijing University of Chemical TechnologyBabak Anasori - Indiana University–Purdue University IndianapolisPeng Zhang - Beijing University of Chemical TechnologyHuan Liu - Beijing University of Chemical TechnologyYury Gogotsi - Drexel University, Materials Science and EngineeringBin Xu - Beijing University of Chemical Technology
- Publication Details
- Advanced functional materials, v 29(51), 1906282
- Publisher
- Wiley
- Number of pages
- 11
- Grant note
- National Key Research and Development Program of China (2017YFB0102204) Beijing Municipal Science and Technology Commission (Z181100004718007) National Natural Science Foundation of China (51572011)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000490586200001
- Scopus ID
- 2-s2.0-85073962967
- Other Identifier
- 991021860806304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter