car-engineer english version car-engineer version française

A new Dual Carbon Battery technology revealed


Power Japan Plus today launched a new battery technology – the Ryden dual carbon battery. This battery offers energy density comparable to a lithium ion battery, but over a longer functional lifetime with improved safety and cradle-to-cradle sustainability. The Ryden battery makes use of a unique chemistry, with both the anode and the cathode made of carbon

“Power Japan Plus is a materials engineer for a new class of carbon material that balances economics, performance and sustainability in a world of constrained resources,” said Dou Kani, CEO of Power Japan Plus. “The Ryden dual carbon battery is the energy storage breakthrough needed to bring green technology like electric vehicles to mass market.”

The Ryden battery balances a breadth of consumer demands previously unattainable by single battery chemistry, including performance, cost, reliability, safety and sustainability.

The Power Japan Plus cell is based on the work of Professor Tatsumi Ishihara at Kyushu University in Japan; Power Japan Plus will continue developing the dual carbon battery technology in partnership with Prof. Ishihara and the university. In a 2013 patent filing on the technology, Ishihara and his colleagues explain the charge and discharge reactions thusly, using a LiPF6 salt:

Positive electrode: PF6 + nC ⇄ Cn(PF6)+e

Negative electrode: Li+ + nC+e ⇄ LiCn

→ charging reaction; ← discharge reaction


The dual carbon battery is energy dense and charges 20 times faster than lithium ion batteries (Figures to be posted later). It is also more powerful than other advanced batteries, operating above four volts.

Dual carbon cell performance


Slots directly into existing manufacturing processes, requiring no change to existing manufacturing lines. The battery allows for consolidation of the supply chain, with only one active material — carbon. Manufacturing of the Ryden battery is under no threat of supply disruption or price spikes from rare metals, rare earth or heavy metals.


First high performance battery that meets consumer lifecycle demand, rated approximately 3,000 charge/discharge cycles.

Dual carbon cell reliability, capacity vs. cycle number


The Ryden battery eliminates the unstable active material used in other high performance batteries, reducing fire and explosion hazard. Even more, the battery experiences minimal thermal change during operation, eliminating the threat of a thermal runaway. Finally, the Ryden battery can be 100 percent charged and discharged with no damage to the battery.


The Ryden battery contains no rare metals, rare earth metals or heavy metals, and is 100 percent recyclable, improving the cradle-to-cradle sustainability of an advanced battery.

“Current advanced batteries have made great improvement on performance, but have done so by compromising on cost, reliability and safety,” said Dr. Kaname Takeya, CTO of Power Japan Plus. “The Ryden dual carbon battery balances this equation, excelling in each category.”

Path to Market

Power Japan Plus will begin benchmark production of 18650 Ryden cells later this year at the company’s production facility in Okinawa, Japan. This facility will allow the company to meet demand for specialty energy storage markets such as medical devices and satellites. For larger demand industries, such as electric vehicles, Power Japan Plus will operate under a licensing business model, providing technology and expertise to existing battery manufacturers to produce the Ryden battery.

Source: Power Japan Plus

Leave a Reply