Energy Conversion Research Laboratory

List of Research Activities

Development of electrical energy storage devices and systems
(Energy Conversion Research Laboratory)

  • Development of high output and high capacity electrical energy storage systems
  • Development of highly safe large-size lithium secondary batteries
    (low-profile hard cases: note-shaped Li-ion batteries)
  • Development of high output and high capacity capacitors and lithium ion capacitors

Research and development of element technologies for electrical energy storage devices
(Battery Evaluation and Analysis Laboratory)

  • Development of pre-doping technology and research on the applicability of the pre-doping technologies to several materials (development of batteries with the pre-doping technologies applied to them)
  • Development of the element technologies for safe lithium ion batteries and safety evaluation technology as well as research on safety mechanisms (associated with the increase in size)
  • Research and development for high input and output as well as long life: reactive homogeneity (in electrode surface and thickness directions and electronic/ionic conductivity balance)

Research and development on advanced materials
(Next-Generation Batteries Laboratory)

Development of next-generation cathode and anode materials for lithium-ion batteries (including incidental technologies for extending life, matching and surface modification)
Development of new electrode materials and electrodes for high input and output (super power lithium ion batteries and next-generation capacitors)
Research on functional expression of battery and capacitor materials (nanomaterials, surface modification, electrode structure, conductivity matrix and pressure)

Support for the evaluation and technological development of battery and capacitor materials and components

Clarification of development directions: Positive and negative electrode active materials, electrodes, binders, electrical conducting materials, separators, electrolyte solutions, additives, etc.
Evaluation research: Continuous support for clients’ research and development from an evaluation standpoint (proposal based on the current positions and development direction of the technologies)

[Recent trends]

  • Resistance (input and output) analyses: Resistance separation analyses, critical load tests (materials, device design, deterioration simulation, secondary deterioration prediction)
  • Deterioration analyses: Capacity and deterioration factor analyses, deterioration mechanism (reaction and SEI) analyses, reactive homogeneity (reactive eccentricity) analyses
  • Evaluation analyses of material problems (approaches to problems regarding low temperature input, electrode formation technology, gas, electrode expansion and contraction and pressure resistance)

Support for the evaluation and technological development of batteries, capacitor devices and systems

  • Evaluation of input and output characteristics, input and output calculation and analyses through the “current-rest-method” resistance of electrical energy storage devices
  • Life and deterioration mechanism analyses of electrical energy storage devices (temperature factors, resistance factors and critical load characteristics: secondary deterioration)
  • Safety evaluation and mechanism analyses of medium- and large-size batteries
  • Support for battery system development (cost minimum simulation, heat radiation property, on-site battery life, safety limit and hybrid type systems)
  • Prototyping of electrodes and device systems (development support for the form of customized design tailored to clients’ development objectives)


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