Li-ion batteries, PhD study proposal

1. | PAGE 1CEA | 10 AVRIL 2012
Title:
Electrolyte solide pour accumulateur Li-ion
Primary lab:
Liten (Laboratoire d’Innovation pour les
Technologies des Energies Nouvelles - Laboratory
for Innovation in New Energy Technologies)
www.liten.fr
http://www.cea.fr/le-cea/les-centres-cea/grenoble
Responsible person :
Vasily TARNOPOLSKIY
(Vasily.TARNOPOLSKIY@cea.fr)
Secondary lab:
Centre Européen de la Céramique
SPCTS UMR CNRS 7315 – LIMOGES, France
Université d’inscription - Ecole doctorale :
Université de Limoges (ED 521)

2. THE TOPIC TO BE ADRESSED :
| PAGE 2Encadrant CEA: Vasily
Combine all-solid-state batteries ADVANTAGES (safety, durability…)
and reach good gravimetric and volumic energy density
 Eliminate flammable & toxic liquid electrolyte
The state of the art:
 Develop Inorganic solid electrolyte
Scientific problem to solve: IMPLEMENTATION in Lithium battery
cathode
anode
Implementation of new techniques to ensure interphase contacts
Expected results and methods to use:
- Initiate the work on the all solid Li-ion batteries in LITEN
- Assemble first operational all-solid-state Li-ion cells
Techniques : Solid-state and sol-gel synthesis, Flame Spray Pyrolysis, plasma deposition, Spark
Plasma Sintering, Impedance.
Need to improve the SAFETY
of Conventional Li-ion cells for large format applications !

3. STRONG POINTS AND MISSON OF CEA
| PAGE 3
 Strong experience in solid-state synthesis (CEA), ceramic powders
treatment (Limoges), conventional lithium-ion batteries (CEA).
 Few experience in all-solid-state batteries (to be gained during this work).
Stack realization: pack the layers with perfect contact between the particles:
Sintering Technics comparison then process optimization
Activity sharing
Synthesis and purchase of solid
electrolytes, characterization
Pellet sintering /
stack assembly
(try different
methods)Cell
assembly, electrochemical
evaluation
Position of the team in relation to the state of the art:
Major technology focus:
Encadrant CEA: Vasily Tarnopolskiy

4. EXPERIMENTAL FACILITIES AND WORK CONTENT
- Synthesis: millers, reactors, ovens…
- Nano-characterization platform: 2500m2 of labs;
- LIB assembling: glove boxes (and dry rooms);
- LIB testing: Battery cyclers, FRAs.
Solid electrolyte
synthesis and
characterization
Electrolyte pellet
manufacturing and
testing in the
impedance cell
Internal experimental means CEA:
External experimental facilities (including experienced in ceramics users):
- Materials synthesis and treatment:
CVD reactors with microwave plasma assistance, laser ablation, plasma transfer and
projection, spray pyrolysis, ceramic treatment (tape
casting, lithography, extrusion, pressing), powder printing methods, sintering methods (including
SPS);
- Materials characterization (optimized for powders, ceramics and surfaces treatment):
XRD, SEM, AFM, XPS, IR, BET, DLS, spectroscopic, mechanical and thermal methods, etc.
Milestones:
Sujets Phares de la DRT Encadrant CEA: Vasily Tarnopolskiy SL-DRT-14-0697
1st year
Full cell:
electrodes design +
planar stack assembly
3rd year2nd year