Solid State Cell Companies

A review of the Solid State Cell Companies and their technology by Dr. Simon Madgwick, Chief Executive Officer, Nuvvon Inc.

Also a Short Introduction to the Reasons to develop a Solid-State Battery by Samsung SDI below. Link to their website and below Reasoning.

Reasons to develop a solid-state battery

Then, why do we need a solid-state battery? It is to increase capacity of EV batteries.  

Market research companies expect that EVs will replace ICEVs(internal combustion engine vehicles), and become the mainstream in the auto industry. And to become the unarguable leader in the industry, EV should have the similar level of mileage as the current ICEV, and it is important to increase the battery capacity of an EV battery to do so.  

There are two ways to increase capacity. First is increasing the number of batteries. But in this case, the battery price goes up and batteries take up so much space in the vehicle. 

A solid-state battery has higher energy density than a Li-ion battery that uses liquid electrolyte solution. It doesn’t have a risk of explosion or fire, so there is no need to have components for safety, thus saving more space. Then we have more space to put more active materials which increase battery capacity in the battery. 

A solid-state battery can increase energy density per unit area since only a small number of batteries are needed. For that reason, a solid-state battery is perfect to make an EV battery system of module and pack, which needs high capacity. 

Short Introduction to the Reasons to develop a Solid-State Battery by Samsung SDI Link to their website and Reasoning.
24m cell manufacturing process. Website picture suggest pressure is required to operate and expansion/contraction needs accommodating (spring loaded clamping fixtures)
Audiance early stage of research and TRL level, appears to be around solid state cells for implantable devices.
BasqueVolt anode polymer solid-state, not lithium metal compatible, cathode electrolyte unstated, operating pressure unstated, operating temperature unstated
Blue Current ceramic separator, silicon anode (not lithium metal compatible / states lithium to be dangerous), cathode electrolyte unclear, requires high pressure to operate (10 bar)
Blue Solutions metal polymer solid state. Requires high temperature to operate (50-80 deg-C). Low energy density (lower than current Li-ion)
BrightVolt solid state, very thin electrodes (<10um) so potentially high power but low energy, operating pressure unstated, operating temperature unstated
C4V polymer separator with liquid in the cathode requiring an “in-situ cooling loop”, operating pressure unstated, operating temperature and range unstated
Enpower Greentech
Factorial solid state polymer separator using lithium metal, cathode electrolyte unclear, requires high pressure to operate (13 bar), temperature range unstated for cell operation
Gangfeng Lithium semi-solid-state technology with cooling system and unstated pressure
Georgia Tech polymer solid electrolyte – separator only – cathode electrolyte not stated
Gotion High Tech “jelly roll technology”, operating pressure unstated, operating temperature and range unstated
Ilika solid state – ceramic separator, high temperature limit, for larger format silicon anode cells cathode electrolyte not stated, pressure not stated
Inventus Battery Energy metal oxide ceramic solid electrolyte based SSB
Ion Storage Systems solid state – ceramic separator ‘sponge’ with lithium metal, ambient pressure, wide temperature range, cathode electrolyte not stated so not obvious if claims are for full cells or scalable for large cells
Ionic Materials solid state separator, not lithium stable, not clear if the solid polymer and can be used in the cathode, pressure unstated, temperature range unstated
Johnson Energy Storage glass separator and cathode electrolyte, wide temperature range, process uses molten glass to penetrate cathodes which are thinner than standard, still at lab concept scale
LiNa Energy sodium batteries, NaNiCl ceramic separator, cathode electrolyte unclear, unstated operating pressure
Lion Volt architecture targeting small scale wearable batteries
Murata solid state – ceramic separator – cathode electrolyte not stated
Nuvvon solid state separator electrolyte and solid polymer cathode electrolyte, lithium metal anode, operating at ambient pressure across a wide temperature range (-10 to +80 deg C), produced on existing Li-ion process
Piersica much detail, separator but unclear regarding cathode electrolyte, unstated operating pressure or temperature range
Prieto polymer solid state, copper foam structure, no performance data
ProLogium semi solid state with good low temp operation but limited upper temperature, unstated operating pressure, not lithium metal compatible, low energy density (similar to current Li-ion)
QuantumScape transparent than most with data, ceramic semi solid state, ceramic separator but gel cathode electrolyte, requires pressure to operate (3.3 bar), long term issues with process scaleup
Sakuu printed battery cells – no data or details available
Samsung SDI separator requiring high pressure (20 bar) and heat (60 deg-C) to operate, electrode electrolyte is unclear
SES hybrid, lithium metal, liquid electrolyte cathode, requiring high pressure to operate (12 bar), upper temperature limitation
Sion Power separator, lithium metal, traditional liquid cathode electrolyte, unstated level of very high pressure to limit dendrite formation, unstated temperature range
Soelect separator, lithium metal, unclear what electrolyte is in the cathode, unstated operating pressure or temperature range at cell level
Solid Power separator requiring very high pressure (unstated) to operate, cathode electrolyte not clear, not lithium metal compatible (silicon anode), operating temperature unclear, hydrogen sulfide risk
Solid State Battery Inc separator using polymer and ionic materials and nano particles – no recent news or data
Toyota/Panasonic separator requiring very high pressure (unstated) to operate, not lithium compatible, cathode electrolyte unclear
Zakuro Battery separator technology enables batteries with a lithium metal anode and using existing manufacturing techniques

If you would like to add to this table or write an in-depth article about one of the chemistries please do drop us a line.

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Cell Manufacturers

More than 100 cell manufacturers listed by chemistry, cell format and downloadable as an excel file.

5 thoughts on “Solid State Cell Companies”

    • Enpower Greentech Inc. (EGI) specializes in the development of Next-Generation batteries, including Lithium Metal Batteries (LMB) and sulfide-based All-Solid-State Batteries (ASSB). EGI offers fast prototyping of customer-designed battery samples in pouch or cylindrical cell formats, with energy densities reaching up to 500 Wh/kg and 1000 Wh/L for pouch cells, and up to 380 Wh/kg and 850 Wh/L for cylindrical cells.

  1. Alpine 4 Holdings Inc.
    Subsidiary Elecjet is currently manufacturing True Solid State Batteries. Ceramic and graphene in nature.

    Marketing under subsidiary RCA’s

    Subsidiary Vayu Aerospace also has installed these SSB’s in their G1 drone sold under government contracts.

    Please add to your list.

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