scholarly journals Transition Metal B-site Substituted Lanthanum Manganite SOFC Cathode Materials

1995 ◽  
Vol 1995-1 (1) ◽  
pp. 472-481 ◽  
Author(s):  
N. M. Sammes
Keyword(s):  
Transition Metal ◽  
Cathode Materials ◽  
Lanthanum Manganite ◽  
Sofc Cathode

scholarly journals Understanding cation-disordered rocksalt oxyfluoride cathodes

2021 ◽  
Vol 9 (12) ◽  
pp. 7826-7837
Author(s):  
Dongchang Chen ◽  
Juhyeon Ahn ◽  
Ethan Self ◽  
Jagjit Nanda ◽  
Guoying Chen
Keyword(s):  
Transition Metal ◽  
Failure Mechanism ◽  
Cathode Materials ◽  
Atomic Level ◽  
Cationic Sublattice ◽  
Anionic Sublattice ◽  
Oxygen Fluorine

A “concerted-densification” based failure mechanism, involving atomic-level changes in both transition-metal cationic sublattice and oxygen/fluorine anionic sublattice, is proposed for the degradation of F-DRX cathode materials.

scholarly journals Impact of Crystallography on Design of Cathode Materials for Li-ion Batteries

2014 ◽  
Vol 70 (a1) ◽  
pp. C20-C20
Author(s):  
Evgeny Antipov ◽  
Nellie Khasanova
Keyword(s):  
Transition Metal ◽  
Cathode Materials ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Li Ion Batteries ◽  
Practical Applications ◽  
Storage Devices ◽  
Li Ion

Ninety percent of the energy produced today come from fossil fuels, making dramatically negative impact on our future due to rapid consumption of these energy sources, ecological damage and climate change. This justifies development of the renewable energy sources and concurrently efficient large storage devices capable to replace fossil fuels. Li-ion batteries have originally been developed for portable electronic devices, but nowadays new application niches are envisaged in electric vehicles and stationary energy storages. However, to satisfy the needs of these rapidly growing applications, Li-ion batteries require further significant improvement of their properties: capacity and power, cyclability, safety and cost. Cathode is the key part of the Li-ion batteries largely determining their performance. Severe requirements are imposed on a cathode material, which should provide fast reversible intercalation of Li-ions at redox potential close to the upper boundary of electrolyte stability window, possess relatively low molecular weight and exhibit small volume variation upon changing Li-concentration. First generation of the cathode materials for the Li-ion batteries based on the spinel (LiM2O4, M – transition metal) or rock-salt derivatives (LiMO2) has already been widely commercialised. However, the potential to further improve the performance of these materials is almost exhausted. The compounds, containing lithium and transition metal cations together with different polyanions (XmOn)p- (X=B, P, S, Si), are now considered as the most promising cathode materials for the next generation of the Li-ion batteries. Covalently-bonded structural frameworks in these compounds offer long-term structural stability, which is essential for good cyclability and safety. Further advantages are expected from combining different anions (such as (XO4)p- and F- ) in the anion sublattice, with the hope to enhance the specific energy and power of these materials. Various fluoride-phosphates and fluoride-sulphates have been recently discovered, and some of them exhibit attractive electrochemical performance. An overview of the research on the cathode materials for the Li-ion batteries will be presented with special emphasis on crystallography as a guide towards improved properties important for practical applications.

Die Eignung einiger Übergangsmetallhalogenide als Kathodenmaterialien / The Suitability of Some Transition Metal Halides as Cathode Materials

1973 ◽  
Vol 28 (11-12) ◽  
pp. 763-771 ◽  
Author(s):  
Günter Eichinger ◽  
Heinz P. Fritz
Keyword(s):  
Cyclic Voltammetry ◽  
Transition Metal ◽  
Cathode Materials ◽  
High Energy ◽  
Metal Halides ◽  
Silver Halides ◽  
Chloro Complexes ◽  
Potentiometric Titrations ◽  
Halide Complexes ◽  
Copper Halides

Some transition metal halides are tested for their suitability as cathode materials in secondary high energy batteries. The solubilities of the silver halides are determined colorimetrically. Furthermore the generation of halide complexes of silver and copper halides in different electrolytes is tested by cyclic voltammetry. It is shown, that with silver and copper halides in different electrolytes, even in a solution of 1 ᴍ LiAlCl4 in PC halide complexes are formed, which rapidly diffuse from the working electrode. The generated chloro complexes were determined by potentiometric titrations as AgCl2, CuCl2 and CuCl2-4. The use of other transition metal halides is also considered.

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