A5077900361- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Advanced Battery Technologies Research
- Transition Metal Oxide Nanomaterials
- Semiconductor materials and devices
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Chemical and Physical Properties in Aqueous Solutions
- Machine Learning in Materials Science
- Extraction and Separation Processes
Beihang University
2018-2022
Abstract Potassium-ion batteries (KIBs) are promising electrochemical energy storage systems because of their low cost and high density. However, practical exploitation KIBs is hampered by the lack high-performance cathode materials. Here we report a potassium manganese hexacyanoferrate (K 2 Mn[Fe(CN) 6 ]) material, with negligible content defects water, for efficient high-voltage K-ion storage. When tested in combination K metal anode, ]-based electrode enables cell specific 609.7 Wh kg −1...
Abstract Nonaqueous potassium ion batteries (KIBs) are one of the emerging electrochemical energy storage technologies due to abundance resources, but difficulties intercalation large size K‐ions into electrode materials hinder development KIBs. Here, a layered vanadate K 0.5 V 2 O 5 is proposed as potential cathode material for Despite K‐ions, as‐fabricated capable delivering reversible capacity around 90 mAh g −1 at 10 mA in voltage range 1.5–3.8 (vs + /K), and also exhibits fast rate...
Nonaqueous potassium-ion batteries (KIBs) are attracting increasing attention as a potential low-cost energy-storage system due to the abundance of potassium resources. Here, cobalt hexacyanocobaltate (Co3 [Co(CN)6 ]2 ), typical Prussian blue analog (PBA), is reported an anode material for nonaqueous KIBs. The as-prepared Co3 exhibits highly reversible capacity 324.5 mAh g-1 at current density 0.1 A , superior rate capability (221 1 and favorable long-term cycling stability (200 cycles with...
Recently, nonaqueous potassium-ion batteries (KIBs) are attracting because of increasing interest due to the abundance potassium resources, but systematic study about effects electrolyte's salt on electrochemical performance electrode materials is still insufficient. Here, it shown that capacity retention and Coulombic efficiency commercial micrometric MoS2 can be remarkably improved by simply using bis(fluorosulfonyl)imide (KFSI) over hexafluorophosphate (KPF6) dissolved in ethylene...
The application of a layered K0.5MnO2 cathode in potassium-ion batteries is limited by its poor cycling performance when charged above 4.0 V (vs K+/K), and the underlying mechanism for this electrochemical instability still unclear. Here, it discovered that ethylene carbonate (EC) will intercalate into depotassiated K0.5MnO2, causing exfoliation compound capacity decay under high charge cutoff voltage. When carbonates are replaced with nonflammable phosphate, K+/K) significantly enhanced...
Recently, potassium-ion batteries (PIBs) are being actively investigated. The development of PIBs calls for cathode materials with a rigid framework, reversible electrochemical reactivity, and high amount extractable K ions, which is extremely challenging due to the large size potassium. Herein, new layered compound K0.83V2O5 reported as potential material PIBs. It delivers an initial depotassiation capacity 86 mAh g-1 exhibits 90 redox 3.5 V (vs K+/K) retention more than 80% after 200...
Potassium-ion batteries (KIBs) are considered as low-cost electrochemical energy storage technologies because of the abundant potassium resources. However, practical applications KIBs mainly hampered by unsatisfactory performance anode materials which often undergo large volume variations during potassiation-depotassiation, limiting their cycling life. Here, sulfurized polyacrylonitrile (S-PAN) is reported an attractive candidate for KIBs. It provides a high capacity 569 mAh g(S-PAN)-1 with...
The capacity degradation mechanism of layered potassium vanadium oxide K<sub>0.5</sub>V<sub>2</sub>O<sub>5</sub> towards K-ion storage was unveiled and the cycling stability this material enhanced by reducing its long-range structural order.
A low-defect K 2 Mn[Fe(CN) 6 ]-reduced graphene oxide composite cathode is shown to demonstrate excellent cycling stability, rate capability, and air stability for potassium-ion batteries.
When tested as the cathode material for potassium-ion batteries, K2V3O8 delivers a highly reversible capacity of over 100 mA h g-1 in voltage range 1.5-4.5 V with 73% retained after 50 cycles. Charge-discharge is achieved by nontopotactic process between and KV3O8 (ΔV ∼ -23.4%), causing slow decay.
To achieve stable cycling of high-energy-density and high-voltage anode-free lithium metal batteries, the interfacial stability both anode cathode is demanded. Electrolytes based on ether solvents tend to have excellent compatibility with anode, but due their low oxidation potential (generally less than 4.0 V vs . Li + /Li), they render LiNi 0.8 Co 0.1 Mn O 2 (NCM811) cathodes unsatisfactory electrochemical performance. Here, an average Coulombic efficiency 99.4% realized for...