Journal ArticleDOI
Electrochemical and In Situ X‐Ray Diffraction Studies of Lithium Intercalation in Li x CoO2
Jan N. Reimers,J. R. Dahn +1 more
Reads0
Chats0
TLDR
In this article, high precision voltage measurements and in situ x-ray diffraction indicate a sequence of three distinct phase transitions as varies from 1 to 0.4, two of which are situated slightly above and below and are caused by an order/disorder transition of the lithium ions.Abstract:
Electrochemical properties of are studied as Li is deintercalated from . High precision voltage measurements and in situ x‐ray diffraction indicate a sequence of three distinct phase transitions as varies from 1 to 0.4. Two of the transitions are situated slightly above and below and are caused by an order/disorder transition of the lithium ions. The order/disorder transition is studied as a function of temperature allowing the determination of an order/disorder phase diagram. In situ x‐ray diffraction measurements facilitate a direct observation of the effects of deintercalation on the host lattice crystal structure. The other phase transition is shown to be first order (coexisting phases are observed for ) involving a significant expansion of the parameter of the hexagonal unit cell. We report the variation of the lattice constants of with and show that the phase transition to the lithium ordered phase near is accompanied by a lattice distortion to a monoclinic unit cell with , , and . Finally we report an overall phase diagram for and .read more
Citations
More filters
Journal ArticleDOI
A garnet structure-based all-solid-state Li battery without interface modification: resolving incompatibility issues on positive electrodes
Chih-Long Tsai,Qianli Ma,Christian Dellen,Sandra Lobe,Frank Vondahlen,Anna Windmüller,Daniel Grüner,Hao Zheng,Sven Uhlenbruck,Martin Finsterbusch,Frank Tietz,Dina Fattakhova-Rohlfing,Hans Peter Buchkremer,Olivier Guillon +13 more
TL;DR: In this article, a new design principle is introduced, based on co-sintering crystalline LCO and Ta-substituted LLZO, which allows the fabrication of high specific areal density and low cell area resistance without the interface modification.
Journal ArticleDOI
Characterization of Thin-Film Lithium Batteries with Stable Thin-Film Li3PO4 Solid Electrolytes Fabricated by ArF Excimer Laser Deposition
TL;DR: In this paper, Li 3 PO 4 thin films have been prepared by pulsed laser deposition (PLD) as a solid electrolyte for thin-film batteries and their structure, composition, ionic conductivity, and electrochemical stability have been characterized.
Journal ArticleDOI
Designing Ionic Conductors: The Interplay between Structural Phenomena and Interfaces in Thiophosphate-Based Solid-State Batteries
TL;DR: In this article, the typical static structural requirements for achieving high ionic conductivities within thiophosphates, which is then extended to how a dynamic lattice and local structural effects can influence ionic transport.
Journal ArticleDOI
Effect of AlF3 coating amount on high voltage cycling performance of LiCoO2
TL;DR: In this article, the effect of AlF3 coating amount on the electrochemical cycling behavior of the LiCoO2 positive electrode was investigated at the high upper voltage limit of 4.5
Journal ArticleDOI
In operando X-ray studies of the conversion reaction in Mn3O4 lithium battery anodes
TL;DR: In this paper, the authors apply synchrotron X-ray diffraction (XRD) and Xray absorption spectroscopy (XAS) to directly observe the conversion reaction of a Mn3O4 anode previously shown to have promising electrochemical performance.
Related Papers (5)
Solid‐State Redox Reactions of LiCoO2 (R3̅m) for 4 Volt Secondary Lithium Cells
Tsutomu Ohzuku,Atsushi Ueda +1 more