Nano LiF-Enabled In Situ Synergistic Catalytic Polymeric Electrolytes for Stable Lithium Metal Batteries.

Solid polymer electrolytes (SPEs) with excellent ionic conductivity and a wide electrochemical stability window are critical for high-energy lithium metal batteries (LMBs). However, the widespread application of polymer electrolytes is severely limited by inadequate room-temperature ionic conductivity, sluggish interfacial charge transport, and uncontrolled reactions at the electrode/electrolyte interface. Herein, we present a uniform polymerized 1,3-dioxolane (PDOL) composite solid polymer electrolyte (PDOL-S/F-nano LiF CSE) that satisfies these requirements through the in situ catalytic polymerization effect of nano LiF on the polymerization of 1,3-dioxolane-based electrolytes.

Bimetallic Sulfides CrVS with Loosely Packed Structure: Exploring the Boundary of Conversion and Intercalation Sodium-Ion Storage Mechanism.

Metal sulfide electrodes for sodium-ion batteries face trade-offs among high capacity, fast kinetics, and stability. The challenge lies in breaking and restoring metal-sulfur bonds and allowing rapid ionic transport. Here we explore the boundary of conversion- and intercalation-type metal sulfides to develop ideal sodium-ion storage materials.

Integrating anti-aggregation Ta-Se motifs into copper selenide for fast and robust sodium-ion storage.

We report a novel bimetallic selenide CuTaSe anode for sodium-ion batteries synthesized a one-step solid-state method. The integration of Ta-Se motifs into copper selenide forms a cubic grid structure that prevents copper atom aggregation and mitigates electrode failure. CuTaSe exhibits a high specific capacity of 305 mAh g at 1 C, excellent rate performance of 286 mAh g at 50 C, and superior cycling stability with 272 mAh g after 3500 cycles at 20 C.

"Lasagna"-Structured SnS-TaS Misfit Layered Sulfide for Capacitive and Robust Sodium-Ion Storage.

Stannous sulfide (SnS), a conversion-alloying type anode for sodium-ion batteries, is strong Na storage activity, a low voltage platform, and high theoretical capacity. However, grain pulverization induced by intolerable volume change and phase aggregation causes quick capacity degradation and unsatisfactory rate capability. Herein, a novel "lasagna" strategy is developed by embedding a SnS layer into the interlayer of an electrochemically robust and electron-active TaS to form a misfit layered (SnS)TaS superlattice.

GeVS: a Novel Bimetallic Sulfide for Robust and Fast Potassium Storage.

Potassium-ion batteries (PIBs) have attracted much attention due to their low production cost and abundant resources. Germanium is a promising alloying-type anode with a high theoretical capacity for PIBs, yet suffering significant volume expansion and sluggish potassium-ion transport kinetics. Herein, a rational strategy is formulated to disperse Ge atoms into transition metal V-S sulfide frameworks to form a loosely packed and metallic GeVS medium.

Observation of High-Capacity Monoclinic B-NbO with Ultrafast Lithium Storage.

Apart from LiTiO, there are few anode substitutes that can be used in commercial high-power lithium-ion batteries. Orthorhombic T-NbO has recently been proven to be another substitute anode. However, monoclinic B-NbO of same chemistry is essentially inert for lithium storage, but the underlying reasons are unclear.

1D Insertion Chains Induced Small-Polaron Collapse in MoS 2D Layers Toward Fast-Charging Sodium-Ion Batteries.

Molybdenum disulfide (MoS ) with high theoretical capacity is viewed as a promising anode for sodium-ion batteries but suffers from inferior rate capability owing to the polaron-induced slow charge transfer. Herein, a polaron collapse strategy induced by electron-rich insertions is proposed to effectively solve the above issue. Specifically, 1D [MoS] chains are inserted into MoS to break the symmetry states of 2D layers and induce small-polaron collapse to gain fast charge transfer so that the as-obtained thermodynamically stable Mo S shows metallic behavior with 10 times larger electrical conductivity than that of MoS .

Multifunctional NaTiO Coating-Enabled High-Voltage and Capacitive-like Sodium-Ion Storage of NaMnO.

Sodium-ion batteries, as an attractive option for large-scale energy storage, still face the problems of low energy density and unsatisfactory rate performance. Among various cathodes, the tunnel-type NaMnO with large S-shaped Na transport tunnels is one of the promising cathode materials for fast and robust sodium-ion storage, yet suffering from Mn dissolution and structural collapse. Herein, a Na-rich layered oxide NaTiO is first constructed as a multifunctional coating layer on the surface of the NaMnO nanorod.

In-Situ-Polymerized 1,3-Dioxolane Solid-State Electrolyte with Space-Confined Plasticizers for High-Voltage and Robust Li/LiCoO Batteries.

In-situ-polymerized solid-state electrolytes can significantly improve the interfacial compatibility of Li metal batteries. Typically, in-situ-polymerized 1,3-dioxolane electrolyte (PDOL) exhibits good compatibility with Li metal. However, it still suffers from the narrow electrochemical window (4.

High Initial Coulombic Efficiency Hard Carbon Anodes Enabled by Facile Surface Annealing Engineering.

Hard carbon (HC) anode shows great potential due to its high capacity and excellent rate performance. However, state-of-the-art HC anode still suffers insufficient initial Coulomb efficiency (ICE) due to the abundant Li-trapping sites. Herein, we demonstrate a facile annealing engineering for HC anodes to improve the ICE and the mechanism is systematically studied.

Boosting Cycling Stability of Polymer Sodium Battery by "Rigid-Flexible" Coupled Interfacial Stress Modulation.

The discontinuous interfacial contact of solid-state polymer metal batteries is due to the stress changes in the electrode structure during cycling, resulting in poor ion transport. Herein, a rigid-flexible coupled interface stress modulation strategy is developed to solve the above issues, which is to design a rigid cathode with enhanced solid-solution behavior to guide the uniform distribution of ions and electric field. Meanwhile, the polymer components are optimized to build an organic-inorganic blended flexible interfacial film to relieve the change of interfacial stress and ensure rapid ion transmission.

Ultrathin MoS Nanowire Network for High-Sensitivity Breathable Piezoresistive Electronic Skins.

Flexible piezosensing electronic skins (e-skins) have attracted considerable interest owing to their applications in real-time human-health monitoring, human-machine interactions, and soft bionic robot perception. However, the fabrication of piezosensing e-skins with high sensitivity, biological affinity, and good permeability at the same time is challenging. Herein, we designed and synthesized MoS nanowires by inserting [MoS] chains between MoS interlayers.

Nanoscale Borate Coating Network Stabilized Iron Oxide Anode for High-Energy-Density Bipolar Lithium-Ion Batteries.

High-capacity metal oxides based on non-toxic earth-abundant elements offer unique opportunities as advanced anodes for lithium-ion batteries (LIBs). But they often suffer from large volumetric expansion, particle pulverization, extensive side reactions, and fast degradations during cycling. Here, an easy synthesis method is reported to construct amorphous borate coating network, which stabilizes conversion-type iron oxide anode for the high-energy-density semi-solid-state bipolar LIBs.

A uniform and high-voltage stable LiTMPO coating layer enabled high performance LiNiCoMnO towards boosting lithium storage.

LiTMPO materials, such as LiNiPO, can maintain structural stability and Li transport activity up to 4.8 V, showing great potential to stabilize layered nickel-rich cathodes at high voltage. But achieving a uniform LiTMPO coating layer remains a great challenge.

Solid Base Assisted Dual-Promoted Heterogeneous Conversion of PVC to Metal-Free Porous Carbon Catalyst.

Polyvinyl chloride (PVC) is widely used in daily life, but its waste has become a serious environmental problem. A solid base assisted low-temperature solvothermal dehalogenation was developed in this work to sustainably and efficiently transform PVC into high-value dimethylamine hydrochloride (DMACl) chemical and N,O co-doped carbon monolith with hierarchically porous structure. The synergistic promotion of solid-base catalyst and solvent decomposition with the removal of HCl can shift forward the chemical equilibrium to promote the dechlorination of PVC and increase the carbon yield.

Assembling Iron Oxide Nanoparticles into Aggregates by LiPO: A Universal Strategy Inspired by Frogspawn for Robust Li-Storage.

The poor ionic conductivity of transition metal oxides (TMOs) is a huge obstacle to their practical application as anodes for lithium-ion batteries (LIBs). Although good performance can be harvested by constructing nanostructures, some other foundmental issues including low tap density and serious electrolyte consumption come along. Herein, inspired by frogspawn, we propose a universal strategy of using lithium salts to assemble TMO nanoparticles into large aggregates to improve their Li conductivity.

Micrometer-Sized, Dual-Conductive MoO /β-MoO Mosaics for High Volumetric Capacity Li/Na-Ion Batteries.

The transition metal oxides (TMOs) with high volumetric capacities are promising anodes for the future electronics, however, they usually suffer from severe capacity decay and poor rate capability. Carbon hybridization and nanosizing can resolve these challenges, yet these significantly compromise the volumetric capacity. Herein, both high capacity and long cycling stability are simultaneously achieved in the micrometer-sized Mo-based oxide particles by designing the dual conductive MoO /β-MoO mosaics.

Electrodes with Electrodeposited Water-excluding Polymer Coating Enable High-Voltage Aqueous Supercapacitors.

Aqueous supercapacitors are powerful energy sources, but they are limited by energy density that is much lower than lithium-ion batteries. Since raising the voltage beyond the thermodynamic potential for water splitting (1.23 V) can boost the energy density, there has been much effort on water-stabilizing salvation additives such as LiSO that can provide an aqueous electrolyte capable of withstanding ~1.

Flexible yet Robust Framework of Tin(II) Oxide Carbodiimide for Reversible Lithium Storage.

Metal-organic frameworks (MOFs) can become promising electrode materials for advanced lithium-ion batteries (LIBs), because their loosely packed porous structures may mitigate volume expansion and metal atom aggregation, which occur at the respective metal oxides. However, they suffer from poor electrical conductivity and irreversible structural degradation upon charge/discharge processes, which impede their practical utilization. Herein, we investigate MOF-like Sn O(CN ) as a new electrode material.

A rationally designed 3D interconnected porous tin dioxide cube with reserved space for volume expansion as an advanced anode of lithium-ion batteries.

To work against the volume expansion (∼300%) of SnO during lithiation, here a sub-micro sized, interconnected, and porous SnO cube with rationally designed reserved space (∼375%) is synthesized via an artful topochemistry route (CaSn(OH)-CaSnO-SnO). Owing to its microstructure, this novel material harvests enhanced lithium-storage performance.

Building an artificial solid electrolyte interphase on spinel lithium manganate for high performance aqueous lithium-ion batteries.

Spinel lithium manganate (LiMn2O4) is a promising cathode for aqueous lithium-ion batteries (ALIBs). However, due to Mn dissolution and the Jahn-Teller effect it suffers from fast capacity fading, insufficient rate capability, and low overcharge resistance. Herein, a ∼2-3 nm artificial solid electrolyte interphase (SEI) layer (lithium polyacrylate, LiPAA) is constructed on the commercial LiMn2O4 (LiPAA@LiMn2O4).