Jan L. Allen
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The Magnetic Ground State of Atacamite Cu$_2$Cl(OH)$_3$: The Crucial Role of Frustrated Zigzag Chains Revealed by Inelastic Neutron Scattering Open
We report inelastic neutron scattering (INS) measurements on the magnetically frustrated $S=\frac12$ sawtooth-chain compound atacamite Cu$_2$Cl(OH)$_3$ featuring inequivalent Cu(1) and Cu(2) sites. Transverse to the sawtooth chains, INS re…
View article: A comprehensive review of lithium-ion battery components degradation and operational considerations: a safety perspective
A comprehensive review of lithium-ion battery components degradation and operational considerations: a safety perspective Open
This review explores degradation pathways, failure risks, and mitigation strategies in lithium-ion batteries, with focus on safety and operation in EVs, ESS, and extreme military environments.
High Conductivity and Rate Capability of NaNb<sub>13</sub>O<sub>33</sub> Wadsley–Roth Phase as a Fast‐Charging Li‐Ion Anode Open
The synthesis and electrochemical insertion of lithium into the Wadsley–Roth NaNb 13 O 33 phase is studied. Lithium intercalation to form Li x NaNb 13 O 33 reaches a value of up to x~15, between 3.0 and 1.0 V vs. Li + /Li at a slow cycling…
View article: Highly reversible Zn metal anode enabled by sustainable hydroxyl chemistry
Highly reversible Zn metal anode enabled by sustainable hydroxyl chemistry Open
Rechargeable Zn metal batteries (RZMBs) may provide a more sustainable and lower-cost alternative to established battery technologies in meeting energy storage applications of the future. However, the most promising electrolytes for RZMBs …
Enhanced mid-infrared emission of Pr<sup>3+</sup> ions in solids through a “3-for-1” excitation process – quantified Open
Evidence is presented that a “three-for-one” process based on two cross-relaxations between Pr 3+ ions efficiently populates the mid-infrared-emitting 3 H 5 manifold in a Pr 3+ -doped low-maximum-phonon-energy host. The concentration depen…
Fast Li-Ion Conduction in Spinel-Structured Solids Open
Spinel-structured solids were studied to understand if fast Li+ ion conduction can be achieved with Li occupying multiple crystallographic sites of the structure to form a “Li-stuffed” spinel, and if the concept is applicable to prepare a …
High-Voltage Lithium-Ion Battery Using Substituted LiCoPO4: Electrochemical and Safety Performance of 1.2 Ah Pouch Cell Open
A LiCoPO4-based high-voltage lithium-ion battery was fabricated in the format of a 1.2 Ah pouch cell that exhibited a highly stable cycle life at a cut-off voltage of 4.9 V. The high-voltage stability was achieved using a Fe-Cr-Si multi-io…
Structural Changes and Reversibility Upon Deintercalation of Li from LiCoPO<sub>4</sub> Derivatives Open
In an effort to improve the cycle life and rate capability of olivine LiCoPO4, Cr, Fe, and Si were added to produce nominal Li1.025Co0.84Fe0.10Cr0.05Si0.01(PO4)1.025. This cathode material has an energy density comparable to LiCoPO4, with …
Changes in Electronic Structure upon Li Deintercalation from LiCoPO<sub>4</sub> Derivatives Open
On the path toward the design of Li-ion batteries with increased energy densities, efforts are focused on the development of positive electrodes that can maximize the voltage of the full cell. However, the development of novel materials th…
View article: Factors Limiting Li<sup>+</sup>Charge Transfer Kinetics in Li-Ion Batteries
Factors Limiting Li<sup>+</sup>Charge Transfer Kinetics in Li-Ion Batteries Open
Understanding the factors limiting Li+ charge transfer kinetics in Li-ion batteries is essential in improving the rate performance, especially at lower temperatures. The Li+ charge transfer process involved in the lithium intercalation of …
The Effect of Relative Density on the Mechanical Properties of Hot‐Pressed Cubic <span> <span>Li</span> </span> <sub>7</sub> <span> <span>La</span> </span> <sub>3</sub> <span> <span>Zr</span> </span> <sub>2</sub> <span> <span>O</span> </span> <sub>12</sub> Open
The effect of relative density on the hardness and fracture toughness of Al‐substituted cubic garnet Li 6.19 Al 0.27 La 3 Zr 2 O 12 ( LLZO ) was investigated. Polycrystalline LLZO was made using solid‐state synthesis and hot‐pressing. The …