boosting aqueous batteries by conversion-intercalation graphite cathode

In situ surface protection for enhancing stability and

DISCUSSION POINTS • Conversion-type cathodes have been viewed as promising candidates for next-generation lithium (Li) and Li-ion batteries with higher specific energy, lower cost, and potentially longer cycle life. • Conversion-type cathodes or intermediate charge/discharge products suffer from various unfavorable interactions and dissolution in organic electrolytes.

Frontiers

Aqueous battery has been gained much more interest for large-scale energy storage fields due to its excellent safety, high power density and low cost. Cryptomelane-type KMn8O16 confirmed by X-ray diffraction (XRD) was successfully synthesized by a modified hydrothermal method, followed by annealed at 400C for 3 h. The morphology and microstructure of as-prepared KMn8O16 investigated by field

Investigation of anode materials for lithium

major cathode-active material in commercial lithium ion rechargeable batteries. Carbon is used for the anode. The lithium battery couple could not function in an aqueous electrolyte, since its charge termination (cut-off) voltage (4.5 V) is high

Frontiers

Aqueous Li

article{osti_1559969, title = {Aqueous Li-ion battery enabled by halogen conversion–intercalation chemistry in graphite}, author = {Yang, Chongyin and Chen, Ji and Ji, Xiao and Pollard, Travis P. and L, Xujie and Sun, Cheng -Jun and Hou, Singyuk and Liu, Qi and Liu, Cunming and Qing, Tingting and Wang, Yingqi and Borodin, Oleg and Ren, Yang and Xu, Kang and Wang, Chunsheng}, abstractNote

Aqueous Li

The use of 'water-in-salt' electrolytes has considerably expanded the electrochemical window of aqueous lithium-ion batteries to 3 to 4 volts, making it possible to couple high-voltage cathodes with low-potential graphite anodessup1-4/sup. However, the limited lithium intercalation capacities (l

Operando surface science methodology reveals surface

Much sharper redox peaks at lower intercalation potential were observed in the CV curves acquired from the device using the ultrathin graphite film cathode (Fig. 4a and Fig. S23) with a derived b value of ∼0.91 (Fig. 4b), revealing a charge-transfer-limited].

Ionic Liquid

In fact, in the early study of the use of graphite as a cathode material for rechargeable Al batteries [], proposals have been made to use chlorine as an intercalation material in graphite. Yang et al. also recently reported the incorporation of chlorine into graphite from chloride-containing electrolytes [ 93 ].

Electrode Materials for Lithium Ion Batteries: A Review

components: anode, cathode, an aqueous/non-aqueous electrolyte and a membrane that separates anode and cathode while being permeable to ions. Being one of the key parts of any new electronic device or elec-tric vehicles, lithium ion batteries have gained

Enabling Natural Graphite in High‐Voltage Aqueous

2.1 Graphite as a Cathode for TFSI – /FSI – Anion Intercalation from an Aqueous Electrolyte We chose 20 mol kg –1 (M) NaFSI + 0.5 M Zn(TFSI) 2 WiBSE as the electrolyte where the high concentration of NaFSI reduces the amount of "free" water in the electrolyte, reducing onset of oxygen evolution reaction (OER) allowing the graphite to be oxidized, and provides FSI – anions.

Department of Chemistry and Biochemistry

If the intercalation graphite anode used in LIB can be replaced by Li metal, a Li/NMC cell (NMC: Li(NiMnCo)O2) can deliver a specific energy of 450-500 Wh/kg. However, such Li/NMC batteries would suffer from safety and cycle stability issues caused by the highly reactive nature of Li metal and its tendency of forming dendrite, as well as instability of high Ni-content NMC during charge

Beyond Lithium

2020/9/10The Front Cover illustrates unique one‐dimensional P2‐type Na 0.67 Ni 0.33 Mn 0.67 O 2 porous microcuboids with abundantly exposed {010} facets, which are used as stable, high power cathode for Na‐ion battery. The high power/energy densities Na‐ion full battery

Environmentally

Current rechargeable batteries generally display limited cycle life and slow electrode kinetics and contain environmentally unfriendly components. Furthermore, their operation depends on the redox reactions of metal elements. We present an original battery system that depends on the redox of I−/I3− couple in liquid cathode and the reversible enolization in polyimide anode, accompanied by

Reversible Chemistry Clears Path for Safer Batteries

This new cathode material, lacking transition metal, operates at an average potential of 4.2 volts with excellent cycling stability, and delivers an unprecedented energy density comparable, or perhaps higher than, non-aqueous Li-ion batteries.

Boosting Zn2+ and NH4+ Storage in Aqueous Media via In‐Situ

VS 2 /VO x is proved to demonstrate a (de)intercalation process for Zn 2+ storage, while a conversion reaction accompanied by insertion is responsible for nonmetal NH 4 +. The strong insight obtained in this study sheds light on a new methodology of exploring the potential of transition metal sulfides‐based cathode materials for aqueous ion batteries.

Salt water battery

High specific capacity from a densely packed stage-I graphite intercalation compound of C3.5[Br0.5Cl0.5] can form reversibly in water-in-bisalt electrolyte. By coupling this cathode with a passivated graphite anode, a cell can achieve an energy density of 460 watt-hours per kilogram of total composite electrode and about 100 per cent coulombic efficiency.

Reversible Chemistry Clears Path for Safer Batteries

Frontiers

Boosting Aqueous Batteries by Conversion

2019/5/15In their recent publication in Nature, Kang Xu, Chunsheng Wang, and co-authors reported for the first time on a novel halogen conversion-intercalation graphite cathode chemistry for the development of high-energy aqueous batteries.As evidenced by experimental

Research Progress and Prospect of Aqueous Zinc Ion Battery

Zinc ion battery, a new type of aqueous secondary batteries proposed in recent years, can deliver high energy and high power density. Meanwhile, safe and efficient discharge processes, cheap and nontoxic electrode materials, and easy fabrication are the advantage of Zinc ion battery, showing great practical value and developmental prospects in the field of scale energy storage.

Boosting Aqueous Batteries by Conversion

cathode chemistry for the development of high-energy aqueous batteries. As evidenced by experimental works and modeling, a densely packed stage-1 graphite intercalation compound (GIC) with a stoichiometry of C 3.5[Br 0.5Cl 0.5] is reversibly formed in a 1

Army discovery opens path to safer batteries

team's development of the novel cathode chemistry further extends available energy for aqueous batteries to a previously unachievable level. Leveraging the reversible halogen conversion and intercalation in a graphite structure enabled by a super the

Investigation of anode materials for lithium

LITHIUM ION POLYMER BATTERIES

Lithium-ion batteries with a lithium iron phosphate cathode and graphite anode have a nominal open-circuit voltage of 3.2 V and a typical charging voltage of 3.6 V. Lithium nickel manganese cobalt (NMC) oxide cathode with graphite anodes have a 3.7 V nominal

Influence of Graphite Characteristics on the

2013/9/19Graphite is a redox-amphoteric intercalation host and therefore different types of cations and anions can be electrochemically intercalated at specific potentials yielding so-called donor-type or acceptor-type graphite intercalation compounds (GICs). 1,2 There exists a broad range of anions which are capable of forming acceptor-type GICs, for example trifluoroacetate, 3 bis