Approaching high-performance potassium-ion batteries via advanced design strategies and engineering

Zhang, Wenchao; Liu, Yajie; Guo, Zaiping

doi:10.1126/sciadv.aav7412

Cited by 879 publications

(602 citation statements)

References 104 publications

Supporting

Mentioning

550

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless, owing to the large ionic radius of the K + ion, cathode materials are more prone to experience the irreversible structural deformation during potassiation/depotassiation processes, which will cause the rapid capacity fading. Yet, it is still a long way to develop cathode materials with a high reversible capacity, high voltage, and long cycle life . As a result, despite the various inspiring research work revolving PIBs cathode, a comprehensive summary regarding the recent advance in cathode materials is still imperative to facilitate the further development of PIBs.…”

Section: Introductionmentioning

confidence: 99%

Review on Recent Advances of Cathode Materials for Potassium‐ion Batteries

Sha

Liu

Zhao

et al. 2020

Energy & Environ Materials

View full text Add to dashboard Cite

Potassium‐ion batteries (PIBs) as a promising supplement to lithium‐ion batteries have drawn great attention attributing to the abundant potassium resources, the fast‐ionic conductivity of potassium ions in electrolyte, and the low standard redox potential of potassium. However, the development of PIBs is still in its infancy, which is largely restricted by the fact that the electrode materials, especially the cathode materials of PIBs, are far from satisfactory in practical applications regarding the capacity, voltage, and cycle life. Therefore, most of current research efforts have been devoted to exploring new and high‐performance electrode materials for achieving PIBs with high capacity and voltage as well as excellent cyclability. In this review, the recent advancements on cathode materials for PIBs are specially summarized. Besides, technological developments, scientific challenges, and future research opportunities of cathode materials for PIBs are also briefly outlooked.

show abstract

Section: Introductionmentioning

confidence: 99%

Review on Recent Advances of Cathode Materials for Potassium‐ion Batteries

Sha

Liu

Zhao

et al. 2020

Energy & Environ Materials

View full text Add to dashboard Cite

show abstract

“…[1,2] Though various carbonaceous materials, alloys, metallic K, and organic compounds have been reported as anodes for PIBs, graphite is still the most promising anode considering its abundance and low voltage. More recently, potassium-ion batteries (PIBs) have received increasing attention due to the high abundance of potassium (K) source and its low cost.…”

mentioning

confidence: 99%

Localized High‐Concentration Electrolytes Boost Potassium Storage in High‐Loading Graphite

Qin

Xiao

Zheng

et al. 2019

Advanced Energy Materials

174

155

View full text Add to dashboard Cite

graphite has a theoretical capacity of 279 mAh g −1 . [3,17] In 2015, Ji and Hu have separately demonstrated the electrochemical intercalation of K ions into graphite in potassium hexafluorophosphate (KPF 6 )/ ethylene carbonate (EC)-diethyl carbonate (DEC) electrolytes. [4,18] However, their works did not achieve a highly reversible K + insertion/extraction process in KPF 6 /EC-DEC electrolyte because the formed solid electrolyte interphase (SEI) becomes fragile and unstable due to the large volume variation (≈60%) during K + insertion/extraction. [19,20] Compared to the conventional lowconcentration electrolyte (LCE), adopting a high-concentration electrolyte (HCE, e.g., >3 m) is a promising strategy to solve the above problem because it possesses some unusual physicochemical and electrochemical properties due to the unique solvation structure of ions, which make it different from an LCE. [21][22][23][24] In 2007, Jeong adopted the concentrated lithium bisperfluoroethylsulfonyl imide LiN(SO 2 C 2 F 5 ) 2 / propylene carbonate (PC) to realize a reversible graphite anode for lithium-ion batteries. [24] Recently, Komaba and Lu have reported the highly reversible graphite anode for PIBs at concentrated potassium bis(fluorosulfonyl)imide (KFSI)/ dimethoxyethane (DME) and KFSI/ethyl methyl carbonate electrolytes, respectively. [25,26] Despite these progresses, the issues of high viscosity, low ionic conductivity, and the increased cost of the HCE still hinder its practical applications. To overcome these disadvantages in using HCE, several groups have added a low-polarity cosolvent to dilute an HCE by forming a localized high-concentration electrolyte (LHCE). It is believed that the introduced cosolvent does not participate in the solvation process. Zhang's group used the bis(2,2,2,-tri-fluoroethyl) ether to dilute the concentrated lithium bis(fluorosulfonyl) imide (LiFSI)/dimethyl carbonate and improve the coulombic efficiency (CE) of lithium metal anodes without dendrite formation. [27] They also diluted concentrated LiFSI in sulfone with a fluorinated ether for high-voltage (4.9 V) lithium metal batteries. [28] Wang's group used the same cosolvent in the concentrated LiFSI/DME to increase both coulombic efficiencies of S cathode and Li anode for Li-S batteries. [29] However, none of the LHCE reported to date has been applied in PIBs, its stability and compatibility with PIBs remain in question.Herein, our work reports for the first time that a highly reversible K + insertion/extraction into graphite interlayer can Reversible intercalation of potassium-ion (K + ) into graphite makes it a promising anode material for rechargeable potassium-ion batteries (PIBs). However, the current graphite anodes in PIBs often suffer from poor cyclic stability with low coulombic efficiency. A stable solid electrolyte interphase (SEI) is necessary for stabilizing the large interlayer expansion during K + insertion. Herein, a localized high-concentration electrolyte (LHCE) is designed by adding a highly fluorinated ether into the con...

show abstract

“…But it has proven very difficult to achieve satisfactory safety and cycle performance with them. These new battery chemistries usually utilize various metal anodes, such as Na, and K metal, which has obvious safety problems due to the dendrite formation . Dendrite growth also results in extremely low Columbic efficiency and cycling performance fading .…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

Smart Materials and Design toward Safe and Durable Lithium Ion Batteries

et al. 2019

View full text Add to dashboard Cite

Smart electrochemical energy storage devices are devices that can operate autonomously to some extent. Although the conventional electrochemical energy storage devices, e.g., the commonly used lithium‐ion batteries (LIBs), may be externally monitored in terms of their voltage and current output to reflect the state of health for the devices, it is extremely important to exploit materials and devices that are intrinsically smart enough to be capable of rapidly self‐detecting and responding to faults, such as interior short circuits, overheating, abnormal capacity drop, and other types of mechanical/chemical damage. These “smart” features could significantly enhance the safety characteristics and durability of LIBs, which is essential for future usage. Therefore, recent achievements toward smart materials and design strategies for safer and more durable LIBs are summarized. The main categories are as follows: 1) New materials: This category mainly includes smart electrode materials with thermal/electrical/mechanical self‐response functions, and self‐response separators to suppress thermal runaway/lithium dendrite growth; 2) New chemistries: This category mainly includes electrolytes with reversible self‐protecting functions; and 3) New architectures with novel functions, such as shape‐recovery, self‐heating, and self‐monitoring. Besides the working mechanisms, the challenges that must be overcome for smart LIBs to be adopted in practical applications are also discussed.

show abstract

Approaching high-performance potassium-ion batteries via advanced design strategies and engineering

Cited by 879 publications

References 104 publications

Review on Recent Advances of Cathode Materials for Potassium‐ion Batteries

Review on Recent Advances of Cathode Materials for Potassium‐ion Batteries

Localized High‐Concentration Electrolytes Boost Potassium Storage in High‐Loading Graphite

Smart Materials and Design toward Safe and Durable Lithium Ion Batteries

Contact Info

Product

Resources

About