An Intrinsically Non‐flammable Electrolyte for High‐Performance Potassium Batteries

Liu, Sailin; Mao, Jianfeng; Zhang, Qing; Wang, Zhi Jie; Pang, Wei; Zhang, Lei; Du, Aijun; Sencadas, Vítor; Zhang, Wenchao; Guo, Zaiping

doi:10.1002/anie.201913174

Cited by 218 publications

(212 citation statements)

References 43 publications

(24 reference statements)

Supporting

Mentioning

208

Contrasting

Order By: Relevance

“…This demonstrates prospects of a battery with a competitive energy density and high voltage operation capabilities. [5][6][7][8][9][10] Although K + has a larger ionic radius of 1.38 Å compared to Li + (0.76 Å) and Na + (1.02 Å), it has the smallest Stokes radius in certain solvents due to the weaker Lewis acidity, which is favorable to the transport behavior within the electrolyte and charge transfer at the electrolyteelectrode interface for PIBs. [11][12] Besides the excellent electrochemistry of K, the compatibility of well-established LIB components such as graphite negative electrodes in PIBs has also stimulated their advancement.…”

Section: Introductionmentioning

confidence: 99%

Potassium Difluorophosphate as an Electrolyte Additive for Potassium-Ion Batteries

Yang

Chen

Hwang

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The limited cyclability and inferior Coulombic efficiency of graphite negative electrodes have been major impediments to their practical utilization in potassium-ion batteries (PIBs). Herein, for the first time, potassium difluorophosphate (KDFP) electrolyte additive is demonstrated as a viable solution to these bottlenecks by facilitating the formation of a stable and K +-conducting solid-electrolyte interphase (SEI) on graphite. The addition of 0.2 wt% KDFP to the electrolyte, results in significant improvements on the (de)potassiation kinetics, capacity retention (76.8% after 400 cycles with KDFP vs. 27.4% after 100 cycles without KDFP) as well as average Coulombic efficiency (~99.9 % during 400 cycles) of graphite electrode. Moreover, the KDFP-containing electrolyte also enables durable cycling of the K/K symmetric cell at higher efficiencies and lower interfacial resistance as opposed to the electrolyte without KDFP. X-ray diffraction and Raman spectroscopy analyses have confirmed the reversible formation of a phase-pure stage-1 potassium-graphite intercalation compound (KC 8) with the aid of KDFP. The enhanced electrochemical performance by the KDFP addition is discussed based on the analysis of the SEI layer on graphite and K metal electrodes by X-ray photoelectron spectroscopy.

show abstract

Section: Introductionmentioning

confidence: 99%

Potassium Difluorophosphate as an Electrolyte Additive for Potassium-Ion Batteries

Yang

Chen

Hwang

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The initial Coulombic efficiencies of CN and MCN samples are 61.4% and 55.3%, respectively. The irreversible capacity loss may be originated from the formation of an SEI layer during the first cycle and electrolyte decomposition (Zhang et al, 2018;Zou et al, 2018;Liu et al, 2020). Figure 3C shows the cycling performance of CNs, MCNs, and BMCNs at 0.1 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Polydopamine-Derived Carbon: What a Critical Role for Lithium Storage?

et al. 2020

View full text Add to dashboard Cite

Polydopamine-derived carbon materials have attracted tremendous attention owing to nitrogen heteroatom doping. However, it is challenging to estimate the effect of the morphology and porosity of the polydopamine-derived carbon for lithium storage. Here, we designed three polydopamine-derived carbon materials with different morphologies and porosity: carbon nanospheres (CNs), mesoporous carbon nanospheres (MCNs), and bowl-like mesoporous carbon nanoparticles (BMCNs) to evaluate the electrochemical performance. Such a bowl-like mesoporous structure combines multiple advantageous features, including mesoporous channels and shorter transmission distance, thus delivering a high specific capacity. In addition, our work provides new insight into the electrochemical performance of polydopamine-derived carbon and a useful reference for its future application in high-performance lithium ion battery (LIB) electrode materials.

show abstract

“…It can be operated by modifying salts, solvents or adding multifunctional additives. [63][64][65] Modifying liquid electrolytes for alkalimetal anodes can not only improve the stability of SEI but also induce homogeneous ion flux and electric field distribution on the surface.…”

Section: Modification Strategies For Alkali-metal Anodesmentioning

confidence: 99%

Recent Advances of Emerging 2D MXene for Stable and Dendrite‐Free Metal Anodes

Wei

Yuan

et al. 2020

Adv Funct Materials

153

View full text Add to dashboard Cite

Metal anodes based on a plating/stripping electrochemistry such as metallic Li, Na, K, Zn, Mg, Ca, Al, and Fe have attracted widespread attention over the past several years because of their high theoretical specific capacity, low electrochemical potential, and superior electronic conductivity. Metal anodes can be paired with cathodes to construct high-energy-density rechargeable metal batteries. However, inherent issues including large volume changes, uncontrollable growth of dangerous dendrites, and an unstable solid electrolyte interphase (SEI) hinder their further development. MXene as an emerging 2D material has shown great potential to address the inherent issues of metal anodes due to its 2D structure, abundant surface functional groups, and the ability to construct macroscopic architectures. To date, under the assistance of MXene, various strategies have been proposed to achieve stable and dendrite-free metal anodes, such as MXene-based host design, designing metalphilic MXene-based substrates, modifying the metal surface with MXene, constructing MXene arrays, and decorating separators or electrolytes with MXene. Herein the applications and advances of MXene in stable and dendrite-free metal anodes are carefully summarized and analyzed. Some perspectives and outlooks for future research are also proposed.

show abstract

An Intrinsically Non‐flammable Electrolyte for High‐Performance Potassium Batteries

Cited by 218 publications

References 43 publications

Potassium Difluorophosphate as an Electrolyte Additive for Potassium-Ion Batteries

Potassium Difluorophosphate as an Electrolyte Additive for Potassium-Ion Batteries

Polydopamine-Derived Carbon: What a Critical Role for Lithium Storage?

Recent Advances of Emerging 2D MXene for Stable and Dendrite‐Free Metal Anodes

Contact Info

Product

Resources

About