Research Digest — 2026-08-07¶
Polymer Electrolytes¶
1. Fast lithium-ion transport in polymer electrolytes with rigid polyanions¶
Source: Nature Nanotechnology (s41565-026-02229-7) · 📅 2026-07-15 · ↗ Open paper
This Nature Nanotechnology study reveals fast and synergistic ion transport mechanisms in composite polymer electrolytes based on rigid polyanions. Using an integrated methodology combining solid-state exchange NMR and Markov chain analysis, the authors achieve multi-scale quantified analysis of distinct lithium-ion pathways. The work reports entropy-driven fast charge-transfer dynamics at the interfaces between lithium metal anodes and composite polymer electrolytes, establishing new design principles for high-conductivity polymer SSEs.
Relevance to DENG.Group
Directly relevant to Naibing Wu's solid polymer electrolyte simulation work. The rigid-polanion design paradigm and the NMR + Markov chain analysis methodology could inform Naibing's MD simulation strategies and provide experimental validation targets.
2. Enhancing Lithium-Ion Transport in Polymer Plastic Crystal Electrolytes¶
Source: Advanced Functional Materials (adfm.202524564) · 📅 2026-06-20 · ↗ Open paper
This study demonstrates a polymer electrolyte design that preserves the intrinsic advantages of succinonitrile (SN) plastic crystal electrolytes while overcoming the limitations of rigid crosslinked networks. The approach achieves enhanced Li-ion transport by combining polymer flexibility with the high ionic conductivity of plastic crystal phases, resulting in improved room-temperature conductivity and electrochemical stability.
Relevance to DENG.Group
Relevant to Naibing Wu's polymer electrolyte work. The plastic crystal composite strategy represents an alternative design paradigm that could be explored through MD simulation in his framework.
Defects & Interfaces¶
3. Void Formation and Evolution Dynamics for Lithium Metal at Solid Electrolyte Interfaces¶
Source: PubMed (41612873) · 📅 2026-07-20 · ↗ Open paper
Banerjee et al. investigate the mechanistic interplay between electro-dissolution kinetics and vacancy diffusion at the Li-solid electrolyte interface that governs void formation. The work develops a computational framework capturing vacancy transport, surface diffusion, and stress-driven morphology evolution during cycling. Results show how operating conditions (current density, temperature, pressure) control void nucleation, growth, and coalescence — ultimately determining interfacial contact loss and cell failure.
Relevance to DENG.Group
Highly relevant to both Shoutong Jin (dendrite/interface modeling) and Umang Agarwal (interface studies). The vacancy-diffusion framework complements existing phase-field approaches and addresses the critical void-formation precursor to dendrite growth.
4. Operando visualization of void formation and recovery at buried lithium-solid electrolyte interfaces¶
Source: Matter (S2590238526003127) · 📅 2026-07-10 · ↗ Open paper
This work utilizes operando video microscopy to study the spatiotemporal evolution of voids at the buried Li-solid electrolyte interface during stripping and plating. Void formation occurs during Li stripping due to uneven dissolution, and the study visualizes recovery dynamics during subsequent plating. The operando observations reveal how stack pressure, current density, and interfacial morphology collectively determine whether voids heal or persist, providing direct experimental evidence for contact loss mechanisms.
Relevance to DENG.Group
Provides essential experimental validation data for the group's interface and dendrite simulation efforts. Shoutong Jin and Umang Agarwal can use these operando observations as benchmark cases for their computational models of interfacial degradation.
Defects & Grain Boundaries¶
5. How Grain Boundaries Impede Lithium-Ion Diffusion and Induce Dendritic Growth¶
Source: Journal of Physical Chemistry Letters (jpclett.5c01371) · 📅 2026-06-15 · ↗ Open paper
This JPCL study uses atomistic simulations to elucidate how grain boundaries in solid-state electrolytes simultaneously impede Li-ion diffusion and promote dendritic lithium growth. The work reveals that localized electronic conductivity at GBs, combined with steric barriers to ion transport, creates conditions favorable for lithium nucleation within grain boundary regions. The findings establish a direct link between GB structure, transport anisotropy, and dendrite initiation.
Relevance to DENG.Group
Directly relevant to Cheng Peng's grain boundary research. The dual role of GBs as both transport barriers and dendrite nucleation sites is a central question for his work. The atomistic simulation methodology also provides a template for Cheng's computational approach.