Incorporation of Organic Benzoquinone Framework Into rGO via Strong π-π Interaction for High-Performance Aqueous Ammonium-Ion Battery.

Aqueous ammonium-ion batteries (AAIBs) are promising candidates for next-generation energy storage devices. However, organic materials as suitable anodes face severe challenges due to their structural instability and poor conductivity, which hinder the development of AAIBs. Herein, an innovative approach is introduced by incorporating an organic benzoquinone framework, 5,7,11,14-tetraaza-6,13-pentacenequinone (TAPQ), with reduced graphene oxide (rGO) using a solvent exchange method.

Achieving Stable Cycling Performance in a P2-Type Layered Oxide Cathode through a Synergic Li/Zn Doping for Sodium-Ion Batteries.

It has been suggested that sodium layered transition metal oxides could potentially serve as excellent cathodes for sodium-ion batteries (SIBs) because of their appropriate operating potentials and high capacities. However, the growing reliance on energy requirements has necessitated a higher energy density of SIBs. It has been demonstrated that activating oxygen-related activities for SIBs is a viable method to improve energy density.

Ultra-expanded interlayer spacing of vanadium oxide nanowires intercalated with poly(3,4-ethylene dioxythiophene) in organic ammonium ion batteries.

Rechargeable batteries employing ammonium (NH) ions have attracted widespread interest owing to the abundant resources, eco-friendliness, and sustainability of NH ions. Herein, an organic-inorganic hybrid is applied to organic NH ion batteries. A poly (3,4-ethylene dioxythiophene) (PEDOT)-intercalated vanadium oxide nanowire (noted as VO-P-) is applied for organic NH ion storage.

Fe-N-C single-atom nanozyme for ultrasensitive, on-site and multiplex detection of mycotoxins using lateral flow immunoassay.

Sensitive, on-site and multiple detection of mycotoxins is a vital early-warning tool to minimize food losses and protect human health and the environment. Although paper-based lateral flow immunoassay (LFIA) has been extensively applied in mycotoxins monitoring, low-cost, portable, ultrasensitive and quantitative detection is still a formidable challenge. Herein, a series of Fe-N-C single-atom nanozymes (SAzymes) were synthesized and systematic characterized.

Organic Ammonium Ion Battery: A New Strategy for a Nonmetallic Ion Energy Storage System.

Nonmetallic ammonium (NH ) ion batteries are promising candidates for large-scale energy storage systems, which have the merit of low molar mass, sustainability, non-toxicity and non-dendrite. Herein, for the first time, we introduce the novel organic ammonium ion batteries (OAIBs). Significantly, a manganese-based Prussian white analogue (noted as MnHCF) as cathode exhibits a reversible capacity of 104 mAh g with 98 % retention over 100 cycles.

Novel High-Performance and Low-Cost Electrochromic Prussian White Film.

Prussian white (PW), due to its low cost, easy synthesis, open structure, and fast ion extraction/interaction, is introduced to the electrochromic field. The PW films were successfully grown on indium tin oxide (ITO) glass by a facial hydrothermal method. Impressively, the PW film exhibits excellent electrochemical cycling stability without obvious decay over 10 000 cycles and a high coloration efficiency of 149.

Boosting the Electrochemical Performance of LiNiCoMnO by Rough Coating with the Superionic Conductor LiLaZrO.

Li-rich Mn-based layered compounds have progressed as promising cathode materials for lithium-ion batteries (LIBs) due to their relatively low cost, considerable energy storage capacity, and high operating voltage. However, they suffer critical drawbacks, such as capacity decay and inferior rate performance, which restrain their real applications. We carried out surface modification via rough coating of superionic conductor LiLaZrO (LLZO) on the Li-rich Mn-based layered cathode.

The Quest for Stable Potassium-Ion Battery Chemistry.

Potassium-ion batteries (KIBs) have attracted wide interest for energy storage because of the abundance of the electrode materials involved; however, their electrochemical performances are far behind what can be achieved from lithium-ion batteries (LIBs) or sodium-ion batteries (SIBs). Herein, key promising electrode and electrolyte materials for potassium-ion batteries are identified, the coupled electrochemical reactions in the cell are investigated, and the compatibility between different materials is demonstrated to play the most important role. K Mn[Fe(CN) ] cathode can deliver a high capacity of ≈125 mAh g and exceptional cycling stability over 61 000 cycles (≈9 months) if the side reactions from the anode can be prevented.

Hierarchical Copper Sulfide Porous Nanocages for Rechargeable Multivalent-Ion Batteries.

Copper sulfide (CuS) has been identified as a promising positive electrode material for some multivalent-ion batteries (such as the magnesium-ion battery) because of its high theoretical capacity, environmental friendliness, and wide availability. However, the clumsy multivalent-ion with high polarity inclines toward sluggish ion insertion/de-insertion, leading to inadequate electrochemical performance. In this work, the hierarchical CuS porous nanocages are successfully fabricated via a facile one-step room-temperature liquid-phase process and evaluated as positive electrode materials for rechargeable magnesium batteries.

N-Doped carbon coated bismuth nanorods with a hollow structure as an anode for superior-performance potassium-ion batteries.

Bismuth (Bi) is a promising anode material for potassium-ion batteries due to its high energy density. However, the large volume change limits its applications. Herein, N-doped carbon coated Bi nanorods with a hollow structure are fabricated and they exhibit excellent long-term cycling performance (88% capacity retention over 1000 cycles) and high-rate ability (297 mA h g-1 at 20C, 94% capacity of that at 1C).

NASICON-Structured Materials for Energy Storage.

The demand for electrical energy storage (EES) is ever increasing, which calls for better batteries. NASICON-structured materials represent a family of important electrodes due to its superior ionic conductivity and stable structures. A wide range of materials have been considered, where both vanadium-based and titanium-based materials are recommended as being of great interest.

Hard carbon anodes of sodium-ion batteries: undervalued rate capability.

The rate capability of hard carbon has long been underestimated in prior studies that used carbon/Na two-electrode half-cells. Through a three-electrode cell setup, we discover that it is the overpotential of the sodium counter electrode that drives the half-cells to the lower cutoff potential prematurely during hard carbon sodiation, particularly at high current rates, which prevents the hard carbon anode from being fully sodiated.

Hydronium-Ion Batteries with Perylenetetracarboxylic Dianhydride Crystals as an Electrode.

We demonstrate for the first time that hydronium ions can be reversibly stored in an electrode of crystalline 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA). PTCDA exhibits a capacity of 85 mAh g at 1 A g after an initial conditioning process. Ex situ X-ray diffraction revealed reversible and significant structure dilation upon reduction of PTCDA in an acidic electrolyte, which can only be ascribed to hydronium-ion intercalation.

Potassium Secondary Batteries.

Potassium may exhibit advantages over lithium or sodium as a charge carrier in rechargeable batteries. Analogues of Prussian blue can provide millions of cyclic voltammetric cycles in aqueous electrolyte. Potassium intercalation chemistry has recently been demonstrated compatible with both graphite and nongraphitic carbons.

Hierarchical nanoporosity enhanced reversible capacity of bicontinuous nanoporous metal based Li-O2 battery.

High-energy-density rechargeable Li-O2 batteries are one of few candidates that can meet the demands of electric drive vehicles and other high-energy applications because of the ultra-high theoretical specific energy. However, the practical realization of the high rechargeable capacity is usually limited by the conflicted requirements for porous cathodes in high porosity to store the solid reaction products Li2O2 and large accessible surface area for easy formation and decomposition of Li2O2. Here we designed a hierarchical and bicontinuous nanoporous structure by introducing secondary nanopores into the ligaments of coarsened nanoporous gold by two-step dealloying.

Polynanocrystalline Graphite: A New Carbon Anode with Superior Cycling Performance for K-Ion Batteries.

We synthesized a new type of carbon-polynanocrystalline graphite-by chemical vapor deposition on a nanoporous graphenic carbon as an epitaxial template. This carbon is composed of nanodomains being highly graphitic along c-axis and very graphenic along ab plane directions, where the nanodomains are randomly packed to form micron-sized particles, thus forming a polynanocrystalline structure. The polynanocrystalline graphite is very unique, structurally different from low-dimensional nanocrystalline carbon materials, e.

Electrochemically Expandable Soft Carbon as Anodes for Na-Ion Batteries.

Na-ion batteries (NIBs) have attracted great attention for scalable electrical energy storage considering the abundance and wide availability of Na resources. However, it remains elusive whether carbon anodes can achieve the similar scale of successes in Na-ion batteries as in Li-ion batteries. Currently, much attention is focused on hard carbon while soft carbon is generally considered a poor choice.

Carbon Electrodes for K-Ion Batteries.

We for the first time report electrochemical potassium insertion in graphite in a nonaqueous electrolyte, which can exhibit a high reversible capacity of 273 mAh/g. Ex situ XRD studies confirm that KC36, KC24, and KC8 sequentially form upon potassiation, whereas depotassiation recovers graphite through phase transformations in an opposite sequence. Graphite shows moderate rate capability and relatively fast capacity fading.

High Energy Density Aqueous Electrochemical Capacitors with a KI-KOH Electrolyte.

We report a new electrochemical capacitor with an aqueous KI-KOH electrolyte that exhibits a higher specific energy and power than the state-of-the-art nonaqueous electrochemical capacitors. In addition to electrical double layer capacitance, redox reactions in this device contribute to charge storage at both positive and negative electrodes via a catholyte of IOx-/I- couple and a redox couple of H2O/Had, respectively. Here, we, for the first time, report utilizing IOx-/I- redox couple for the positive electrode, which pins the positive electrode potential to be 0.

Nanoporous Ru as a carbon- and binder-free cathode for Li-O2 batteries.

Porous carbon-free cathodes are critical to achieve a high discharge capacity and efficient cycling for rechargeable Li-O2 battery. Herein, we present a very simple method to directly grow nanoporous Ru (composed of polycrystalline particles of ∼5 nm) on one side of a current collector of Ni foam via a galvanic replacement reaction. The resulting Ru@Ni can be employed as a carbon- and binder-free cathode for Li-O2 batteries and delivers a specific capacity of 3720 mAh gRu (-1) at a current density of 200 mA gRu (-1) .

A new low-voltage plateau of Na3V2(PO4)3 as an anode for Na-ion batteries.

A low-voltage plateau at ∼0.3 V is discovered for the deep sodiation of Na3V2(PO4)3 by combined computational and experimental studies. This new low-voltage plateau doubles the sodiation capacity of Na3V2(PO4)3, thus turning it into a promising anode for Na-ion batteries.

Low-surface-area hard carbon anode for na-ion batteries via graphene oxide as a dehydration agent.

Na-ion batteries are emerging as one of the most promising energy storage technologies, particularly for grid-level applications. Among anode candidate materials, hard carbon is very attractive due to its high capacity and low cost. However, hard carbon anodes often suffer a low first-cycle Coulombic efficiency and fast capacity fading.