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Technology


Innovative materials development by Envia Enables Higher Energy density cells

 

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Technology


Innovative materials development by Envia Enables Higher Energy density cells

 

Cathode Development

Envia has engineered high energy compositions (Ni, Co, Mn and Li2MnO3) with innovative particle morphologies (particle size, shape, distribution, tap density & porosity) and specialized dopants and nanocoatings resulting in major improvements to capacity, rate, cycle life & safety. Envia has developed two primary cathode compositions: HCMR and CRC. The graph below describes the benefits of Envia's cathode material.

 
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Anode Development

Envia has developed proprietary silicon-based formulations that incorporate robust binders and tailored conductive additives. In comparison to other silicon-based anodes, Envia's offer higher specific capacity, longer cycle life, and lower cost. Envia's anodes are unique in their high loading level and high active silicon content. 

 
 

Intellectual property

Cathode and anode intellectual property are the cornerstones to Envia's patent portfolio. In addition to cathode and anode technology, Envia has substantial intellectual property in cell design and electrolytes. Envia currently has 23 granted patents and over 20 patent applications.


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New Aerial Applications


 

 

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New Aerial Applications


 

 

NEW AErial applications

Weight is one of the most important factors when determining the functionality and performance of an aerial vehicle. Envia offers more energy per unit of weight than any battery available, enabling many more flight miles or increased load.

Cell characteristics Value
Cell capacity at C/10 rate (Ah) 10.6
Specific energy at C/10 rate (Wh/kg) 350
Energy density at C/10 rate (Wh/L) 840
Cell weight (g) 111
Cell dimensions (mm) 145 x 64 x 5
Nominal voltage (V) 3.65
Operating temperature (°C) -30 to 55
Voltage range (V) 2.5 - 4.47
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New Mobility


 

 

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New Mobility


 

 

Advanced mobile devices

Mobility has never been more important and devices are becoming more demanding of the batteries. Some applications will simply not be feasible without a better battery. The energy density of Envia's battery enables much longer run time and smaller dimensions than commercial cells.

Cell characteristics Value
Cell capacity at C/5 rate (Ah) 1-5
Specific energy at C/5 rate (Wh/kg) 280-310
Energy density at C/5 rate (Wh/L) 680-720
Swelling at 60°C for 72h (%) <8
Swelling over the cell life (%) <8
Cycle life at C/2 450
Nominal voltage (V) 3.6
Operating temperature (°C) -20 to 45
Voltage range (V) 3.0 - 4.4
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Electric Vehicles


 

 

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Electric Vehicles


 

 

Electric Vehicles

Electric mobility is one of the most important efforts in the global fight against climate change. However, in order to truly compete with internal combustion engine vehicles, the cost of electric vehicles needs to decrease and the vehicle range needs to increase. Today's options are a $30K vehicle that travels 90 miles per charge or a $100K vehicle that travels 270 miles per charge -- neither of which appeals to the general population. Envia's technology dramatically reduces battery costs through low cost electrode materials and high energy density cells, ultimately reaching $100/kWh. Envia's first generation electric vehicle cell is 234 Wh/kg, using a manganese rich cathode and graphite anode. Envia's second generation cell will utilize its silicon based anode, enabling much higher energy density.

Cell characteristics Value
Cell capacity at C/3 rate (Ah) 26.5
Specific energy at C/3 rate (Wh/kg) 234
Energy density at C/3 rate (Wh/L) 438
Power density at 80% DOD in 1C - 30s test (W/L) 2,400
Specific power at 80% DOD in 1C - 30s test (W/kg) 1,317
Cycle life at C/3 1,000
Nominal voltage (V) 3.69
Cell weight (g) 407
Cell dimensions (mm) 225 x 165 x 6
Operating temperature (°C) -30 to 55
Voltage range (V) 2.3 - 4.35