HD-Energy Technology

Why Enevate Energy Cells?

Continuing a long history of battery innovation, Enevate delivers tomorrow’s battery capacity utilizing today’s standard Lithium-ion (Li-ion) ecosystem. Patented breakthrough HD-Energy Technology® delivers 4X the anode energy density than that of conventional Li-ion batteries.

Ultrafast Charging

Charge to 90% in 15 minutes and 50% in just over 5 minutes—8X faster than conventional batteries and more than 5X faster than the best “fast-charge” Li-ion batteries. All of this is possible without sacrificing energy density as is normally the case in conventional graphite batteries.

High Energy Density

More than 4X the energy density of conventional graphite anode materials in an ultrathin form factor.

Longer Runtime

Up to 50% longer runtime, as tested, over same-sized conventional battery.

Energy on Demand

eBoost feature provides access to 25% of capacity on reserve when needed, available when discharged below 3.3V for everyday cycling.

Excellent Low Temperature Performance

Excellent performance down to -10°C , even down to -20°C and beyond.

Certified Safe

Rigorous testing by independent and third-party labs and multiple international safety certifications to ensure safe battery operation.

How Does a Lithium-ion Battery Work?

Lithium-ion (Li-ion) batteries offer powerful advantages over other rechargeable (secondary) battery technologies such as NiMH or NiCd:

  • They’re lighter than other types of rechargeable batteries of the same size because they’re made of lightweight lithium and carbon.
  • They can store much more energy than other rechargeable batteries because lithium is a reactive element.
  • They hold their charge with Li-ion battery packs, losing less than 5% charge per month.
  • They have no memory effect and can handle hundreds of charge/discharge cycles.

When the battery charges, lithium ions move through the electrolyte from the positive electrode to the negative electrode and react to the carbon. During discharge, the lithium ions move back to the metal oxide from the carbon.


Traditional Li-ion Batteries

Graphite has historically been the anode material of choice for Li-ion batteries. Silicon is an anode material that has been of great interest due to its high gravimetric energy density.

Graphite-dominant Li-ion cells using silicon as an additive are easier to implement, but additive amounts are typically less than 10% and the additives themselves are diluted silicon compounds, such as silicon oxide.

Other silicon-dominant (more than 50% silicon) approaches to date—such as those using silicon wafers and silicon nanowires—are typically difficult to manufacture and offer low material density at the battery cell level.

Li-ion battery batteries rechargeable blueprint
li-ion rechargeable batteries battery ultrafast charging

Enevate Corporation’s
Unique Approach

Enevate’s HD-Energy Technology, a self-standing, silicon-dominant composite anode with more than 70% silicon, charges up to 8X faster and delivers more than 4X the energy density of conventional graphite anode materials in an ultrathin form factor for today’s ultraslim devices.

Enevate’s conductive, silicon-dominant composite film anode is essentially 100% active material that can store lithium and has a high electrical conductivity. This anode enables Enevate to deliver ultrafast charging, high energy density, and long runtimes in its Li-ion batteries.

energy density chart, li-ion batteries hd-energy

The new silicon-dominant monolithic composite anode combined with the overall battery cell architecture enables ultrafast charging, high volumetric and gravimetric energy density, structural integrity, and electrical conductivity.

Enevate's HD-Energy material structure, SEM photo

Enevate’s HD-Energy material structure, SEM photo

Ultra-thin HD-Energy anode cross section, SEM photo

Ultrathin HD-Energy anode cross section, SEM photo

Using an inexpensive silicon source, Enevate cost-effectively manufactures its own silicon-dominant active anode material film from raw materials for a self-standing, single-particle anode with significantly more than 70% silicon. And we are ISO9001:2008 certified for quality manufacturing practices.

More Technical Details

The HD-Energy Technology anode properties include:

  • Silicon-dominant: contains more than 70% silicon
  • Gravimetric energy density: ~2800 mAh/g with 1500 mAh/g utilized in cell designs with volumetric and energy densities of ~750 Wh/L, ~300 Wh/kg
  • High initial Coulombic efficiency: 93% for anode, ~90% for full cells in high density of anode: 1-1.5 g/cc
  • Compatible with existing high volume manufacturing processes (unlike nanowire or silicon wafer silicon-dominant approaches)
hd energy silicon nanowire

The cell construction process used for conventional stacked Li-ion pouch cells is the same process we use today but using a significantly thinner anode due to its 4X higher energy density. And as with conventional stacked Li-ion cells, Enevate cells are put into polymer pouches and then vacuum-sealed for distribution.

Roll-form Anode Manufacturing
Enevate Proprietary Process
Cell and Pack Assembly Partners

Download Enevate’s Technical Overview Poster as presented by
Benjamin Park, PhD at the 2016 IMLB Conference