Hydrogen-Deficient Chain-Like Molecular Structure Confined Hydride Electrolyte for High-Voltage All-Solid-State Lithium Metal Batteries.

The practical application of LiBH in all-solid-state Li metal batteries (ASSLMBs) is hindered by low Li-ion conductivity at room temperature, poor oxidative stability, and severe dendrite growth. Herein, porous [LiNBH] with a hydrogen-deficient chain-like molecular structure are designed for in situ space-confining LiBH, which enables strong attraction of negatively charged H atoms of [BH] anions by Li of [LiNBH] chains that weakens Coulombic interaction between Li and [BH] anions and hence promotes Li ion diffusion. Additionally, the electron-withdrawing effect of [LiNBH] chains induces the local electron localization of LiBH that enhances oxidative stability of LiBH.

A High-Capacity Semiconductor Organic Polymer for Stable Aqueous Ammonium-Ion Storage.

In aqueous ammonium-ion storage (AAIS), effective hydrogen-binding sites are crucial for designing high-performance ammonium ions (NH ) host materials. The organic small molecule tetraamino-p-benzoquinone (TABQ) shows great potential in AAIS due to its unique hydrogen-bonding interactions with NH . However, such small-molecule materials typically exhibit severe dissolution in aqueous electrolytes.

Double Confinement Design to Access Highly Stable Intermetallic Nanoparticles for Fuel Cells.

Maintaining the stability of low Pt catalysts during prolonged operation of proton exchange membrane fuel cells (PEMFCs) remains a substantial challenge. Here, a double confinement design is presented to significantly improve the stability of intermetallic nanoparticles while maintaining their high catalytic activity toward PEMFCs. First, a carbon shell is coated on the surface of nanoparticles to form carbon confinement.

Advances on Defect Engineering of Niobium Pentoxide for Electrochemical Energy Storage.

The reasonable design of advanced anode materials for electrochemical energy storage (EES) devices is crucial in expediting the progress of renewable energy technologies. NbO has attracted increasing research attention as an anode candidate. Defect engineering is regarded as a feasible approach to modulate the local atomic configurations within NbO.

Unraveling 3d Transition Metal (Ni, Co, Mn, Fe, Cr, V) Ions Migration in Layered Oxide Cathodes: A Pathway to Superior Li-Ion and Na-Ion Battery Cathodes.

Li-ion and Na-ion batteries are promising systems for powering electric vehicles and grid storage. Layered 3d transition metal oxides ATMO (A = Li, Na; TM = 3d transition metals; 0 < x ≤ 2) have drawn extensive attention as cathode materials due to their exceptional energy densities. However, they suffer from several technical challenges caused by crystal structure degradation associated with TM ions migration, such as poor cycling stability, inferior rate capability, significant voltage hysteresis, and serious voltage decay.

Experimentally validated design principles of heteroatom-doped-graphene-supported calcium single-atom materials for non-dissociative chemisorption solid-state hydrogen storage.

Non-dissociative chemisorption solid-state storage of hydrogen molecules in host materials is promising to achieve both high hydrogen capacity and uptake rate, but there is the lack of non-dissociative hydrogen storage theories that can guide the rational design of the materials. Herein, we establish generalized design principle to design such materials via the first-principles calculations, theoretical analysis and focused experimental verifications of a series of heteroatom-doped-graphene-supported Ca single-atom carbon nanomaterials as efficient non-dissociative solid-state hydrogen storage materials. An intrinsic descriptor has been proposed to correlate the inherent properties of dopants with the hydrogen storage capability of the carbon-based host materials.

New Insights into the Effects of Zr Substitution and Carbon Additive on LiErZrCl Halide Solid Electrolytes.

Halide solid electrolytes have been considered as the most promising candidates for practical high-voltage all-solid-state lithium-ion batteries (ASSLIBs) due to their moderate ionic conductivity and good interfacial compatibility with oxide cathode materials. Aliovalent ion doping is an effective strategy to increase the ionic conductivity of halide electrolytes. However, the effects of ion doping on the electrochemical stability window of halide electrolytes and carbon additive on electrochemical performance are still unclear by far.

A Redox Couple Strategy Enables Long-Cycling Li- and Mn-Rich Layered Oxide Cathodes by Suppressing Oxygen Release.

Li- and Mn-rich layered oxides (LMROs) are considered the most promising cathode candidates for next-generation high-energy lithium-ion batteries. The poor cycling stability and fast voltage fading resulting from oxygen release during charging, however, severely hinders their practical application. Herein, a strategy of introducing an additional redox couple is proposed to eliminate the persistent problem of oxygen release.

A Novel Tin-Bonded Silicon Anode for Lithium-Ion Batteries.

Poor cyclic stability and low rate performance due to dramatic volume change and low intrinsic electronic conductivity are the two key issues needing to be urgently solved in silicon (Si)-based anodes for lithium-ion batteries. Herein, a novel tin (Sn)-bonded Si anode is proposed for the first time. Sn, which has a high electronic conductivity, is used to bond the Si-anode material and copper (Cu) current collector together using a hot-pressed method with a temperature slightly above the melting point of Sn.

In Situ Encapsulation of the Nanoscale ErO Phase To Drastically Suppress Voltage Fading and Capacity Degradation of a Li- and Mn-Rich Layered Oxide Cathode for Lithium Ion Batteries.

A novel strategy of in situ precipitation and encapsulation of the ErO phase on the Li(LiNiCoMn)O (LNCMO) cathode material for lithium ion batteries is proposed for the first time. The ErO phase is precipitated from the bulk of the LNCMO material and encapsulated onto its entire surface during the calcining process. Electrochemicial performance is investigated by a galvanostatic charge and discharge test.