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Electrical Storage
BMBF
Lithium-ion batteries 11.4.2017
Preparation of copper hexacyanoferrate by precipitation. Copper hexacyanoferrate is used as active material in positive electrodes in several kinds of aqueous metal-ion batteries. In particular, the possibility to use it in zinc-ion battery has been demonstrated during the project.
© CES - Zentrum für Elektrochemie

New generation of lithium-ion batteries

A young research group investigated aqueous electrolytes based on lithium-ion batteries for intermediate storage of electrical energy. The young researchers are developing new coatings and electrolytes for the stabilization of the active components.

Project status Development of active materials
Project duration March 2012 until February 2018

The aim of this project of research is to develop stable and cheap aqueous lithium-ion batteries. This aim can be reached only through studying, understanding and optimizing all the parameters of the battery: electrolyte; positive and negative electrodes and current collectors; separator; configuration. The use of aqueous based electrolyte will not only impact the price of such device, but also improve the power density, due to the increase in the ion concentration and conductivity of the electrolyte. Development of gel-polymer water-based electrolyte is necessary for the increase of the stability of the electrolyte. High voltage lithium intercalation/insertion compounds stable in water have to be developed, in conjunction with negative materials with high specific charge. Ti-based compounds and complexes, and conductive polymers will be investigated as potential negative electrode for such batteries. Non-reactive current collectors and bipolar plates will be develop, for an optimal transport of electrons trough the system.

  • Rafael Trocoli (post-doctoral researcher) is setting the tubular furnace for the calcination of the materials to use in the aqueous lithium-ion batteries. The materials produced are typically of the kind LiMn2-xAlxO4 spinel structures. © CES - Zentrum für Elektrochemie
  • Multichannel potentiostat working station. The multichannel potentiostat allows measuring simultaneously 5 different batteries. It is mostly used to run parallel experiments and accelerate the evaluation of the performances of new materials or new electrolytes for aqueous metal-ion batteries. Argon line connection is possible, for experiments that need inert atmosphere. © CES - Zentrum für Elektrochemie
  • Anastasia Dushina (doctoral student) is preparing the cell connected to a quadrupole mass spectrometer for testing the activity of water in gel electrolytes. The activity of water in gel electrolytes plays a significant role in the stability of the electrolyte, which is important for obtaining long life cycles in aqueous metal-ion batteries. © CES - Zentrum für Elektrochemie
  • Anastasia Dushina (doctoral student) and Jelena Stojadinovic (post-doctoral researcher) are discussing the results of the mass spectrometer and extraction of the data on the activity of water. A new methodology has been developed during the project for the estimation of important properties of electrolytes in batteries. © CES - Zentrum für Elektrochemie
  • Preparation of copper hexacyanoferrate by precipitation. Copper hexacyanoferrate is used as active material in positive electrodes in several kinds of aqueous metal-ion batteries. In particular, the possibility to use it in zinc-ion battery has been demonstrated during the project. © CES - Zentrum für Elektrochemie

Project status

  • Synthesis and characterization of water-based gel electrolytes, with high conductivity and higher stability window (about 2 V).
  • Developement of active materials for negartive electrodes with high specific charge for use in aqueous environment. Test of different coating to improve performances.
  • Development of active materials for positive electrodes with high working voltage and high stability. Test of different coatings to improve performances.
  • Understanding the degradation mechanism of the active materials by analyzing ideal thin sputtered films.
  • Leistungsmanagement und Bipolarplatten für wässrige Lithiumionenbatterien
  • Building a 10V battery based on the developed materials and electrolytes, composed by 5 cells.
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Supported by: The Federal Government on the basis of a decision by the German Bundestag

Dates

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Addresses

Coordinator
Other Addresses

Infobox

Research funding

The information system EnArgus provides information on research funding, including on this project (German only).