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Freestanding LiPON: from Fundamental Study to Uniformly Dense Li Metal Deposition Under Zero External Pressure
Diyi Cheng, Thomas Wynn, Bingyu Lu +12
Lithium phosphorus oxynitride (LiPON) is a well-known amorphous thin film solid electrolyte that has been extensively studied in the last three decades. Despite the promises to pai…
Unraveling the stable cathode electrolyte interface in all solid-state thin-film battery operating at 5V
Ryosuke Shimizu, Diyi Cheng, Minghao Zhang +6
Spinel-type LiNi0.5Mn1.5O4 (LNMO) is one of the most promising 5 V-class cathode materials for Li-ion batteries that can achieve high energy density and low production costs. Howev…
Disorder Dynamics in Battery Nanoparticles During Phase Transitions Revealed by Operando Single-Particle Diffraction
Jason Huang, Daniel Weinstock, Hayley Hirsh +9
Structural and ion-ordering phase transitions limit the viability of sodium-ion intercalation materials in grid scale battery storage by reducing their lifetime. However, the combi…
Structure-selective operando x-ray spectroscopy
Daniel Weinstock, Hayley S. Hirsh, Oleg Yu. Gorobtsov +6
The relationship between charge and structure dictates the properties of electrochemical systems. For example, reversible Na-ion intercalation - a low-cost alternative to Li-ion te…
Conformal Three-Dimensional Interphase of Li Metal Anode Revealed by Low Dose Cryo-Electron Microscopy
Bing Han, Xiangyan Li, Shuang Bai +7
Using cryogenic transmission electron microscopy, we revealed three dimensional (3D) structural details of the electrochemically plated lithium (Li) flakes and their solid electrol…
Interaction and transformation of metastable defects in intercalation materials
O. Yu. Gorobtsov, H. Hirsh, M. Zhang +10
Non-equilibrium defects often dictate macroscopic functional properties of materials. In intercalation hosts, widely used in rechargeable batteries, high-dimensional defects largel…
Imaging real-time amorphization of hybrid perovskite solar cells under electrical biasing
Min-cheol Kim, Namyoung Ahn, Diyi Cheng +11
Perovskite solar cells have drawn much attention in recent years, owing to its world-record setting photovoltaic performances. Despite its promising use in tandem applications and…
Unveiling the Stable Nature of the Solid Electrolyte Interphase between Lithium Metal and LiPON via Cryogenic Electron Microscopy
Diyi Cheng, Thomas Andrew Wynn, Xuefeng Wang +11
The solid electrolyte interphase (SEI) is regarded as the most complex but the least understood constituent in secondary batteries using liquid and solid electrolytes. The nanostru…
Quantifying Inactive Lithium in Lithium Metal Batteries
Chengcheng Fang, Jinxing Li, Minghao Zhang +16
Inactive lithium (Li) formation is the immediate cause of capacity loss and catastrophic failure of Li metal batteries. However, the chemical component and the atomic level structu…