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energy density

Firm announces silicon boosted lithium-ion battery reaches 1,000mAh/g

Thu, 07/01/2021 - 11:16 -- Paul Crompton
One Battery sciences logo

OneD Battery Sciences has unveiled an electric vehicle battery that uses silicon nanowires to boost the energy density of lithium-ion cells.

The announcement follows three years of testing on commercial EV-grade graphite used in the anodes of EV batteries by unnamed graphite suppliers, cell manufactures, and EV makers in the US, Europe, and Asia.

During testing, the firm provided customers with standard versions of the Sinanode anodes for laboratory testing. 

OneD says customers plan to further customise the process to meet their specific needs, including processing large enough quantities to build EV cells for optimization and qualification. 

Testing was conducted in pilot Sinanode facilities, which included the equipment needed to process the graphite powders provided by the OEM.

The June 10 announcement marked the commercial launch of the firm’s pilot line production program dedicated to electric vehicle OEMs. 

The first two facilities are in the US, and additional facilities are under negotiation.

Each facility is set up to process up to 800kg of anode active material per month, and enough anode active material for 34MWh.

Sinanode Pilot processing will begin around the end of the year and the firm anticipates its first anchor tenant to start production by the end of this year or early 2022. Until then, it is processing in its Palo Alto pilot facility.

OneD’s chief commercial officer Fabrice Hudry told BEST: “The Sinanode process is two parts: a Catalyst step and Silicon step. 

“The Catalyst step deposits nanoparticles of copper oxide onto the graphite particles. The Silicon step uses CVD ovens to grow silicon nanowires onto the graphite particles. 

“Each facility has a small production team dedicated full time to the OEM’s processing. The OEM can process multiple graphite powders and select various silicon percentages; they can also work with the OneD R&D team to access many inventions related to adopting the anode materials in specific electrode manufacturing processes and cell designs.

“We expect OEMs to fine-tune EV cells for both the high end and the low end of their EV models due in 2025. These models will enter production by 2024 and we will have the large scale processing ready by then to process according to their fully qualified specific Sinanode formulation.

Existing manufacturing processes

The company’s CEO, Vincent Pluvinage, told BEST: “Over the last ten years, we have built and tested thousands of full pouch cells built with various graphite substrates and various commercial cathodes. 

“We have also tested cells built by our customers from 18650 format to 60 Ah pouch formats. 

“We are currently negotiating the contracts for the programs.”

The firm’s Sinanode technology integrates into existing manufacturing processes to fuse silicon nanowires onto commercial graphite powders.

The higher energy density increases battery range while nanowires shorten charging time, which will enable OEMs to design and produce electric vehicles that answer market demands, say the firm.

The company says its Sinanode pushes the anode specific capacity to around 1,000mAh/g.

A graphite anode, which is widely used in commercial lithium-ion batteries, has a theoretical specific capacity of 372mAh/g.

The Sinanode anode material can be blended with graphite, to achieve initial coulombic efficiency of around 92%, and more than 1,000 full charge cycles than commercially available EV cells.

This reduces the investments and time necessary to scale up the Sinanode step to EV quantities, while decreasing the cost of EV anodes (measured in $ per kWh) by almost 50%, when compared to the cost of most competitive anodes used in EV batteries today.

Pluvinage said: “During this decade, we will witness the largest and fastest transformation of a global industry that’s ever been seen, and the decisions made today will determine which car makers come out on top.


“EV demand will be driven by range, charge time, and cost, and our technology addresses each of these purchase drivers in a significant way.”

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Panasonic to boost energy density and develop cobalt free 2170 lithium-ion cells

Fri, 08/14/2020 - 09:53 -- Paul Crompton

Tesla’s long-term battery partner aims to increase the energy density of its 2170 cells by 20% within five years and commercialise a cobalt-free version within three years.

The bold claims by the head of Japan’s Panasonic’s US EV battery business, Yasuaki Takamoto, were reported by global news agency Reuters.


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Samsung’s 900Wh/L solid-state battery could open up EV possibilities

Fri, 03/13/2020 - 14:17 -- Paul Crompton

Samsung has revealed a prototype solid-state battery that boasts an energy density up to 900Wh/L at around 50% smaller by volume than a conventional lithium-ion battery.

The prototype pouch cell would enable an EV to travel up to 800km on a single charge, and features a cycle life of more than 1,000 charges.

Image: (From left) Yuichi Aihara, Principal Engineer from SRJ, Yong-Gun Lee, Principal Researcher and Dongmin Im, Master from SAIT

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Will Europe be a leader or a follower? Dissatisfaction with lithium-ion raises its voice

Fri, 12/06/2019 - 15:17 -- Paul Crompton

Dissatisfaction with lithium-ion battery technology is gaining traction among the industry, with the issues of safety, energy density and cost cited as significant factors.

The concerns were raised during a panel discussion at the Battery and Energy Storage conference in Birmingham, UK, last week.

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Encouraging tests as EEStor plans to usurp lead-acid with bipolar supercapacitors

Thu, 12/05/2019 - 15:24 -- Paul Crompton

Bipolar technology firm EEStor Corp. and FWG have revealed independent test results demonstrating the energy density of its doped-carbon supercapacitors is on average of 53.31Wh/kg.

A report by inspection, verification, testing and certification company SGS-CSTC was prepared after tests on five single cell devices weighing around 36 grams each at its electrical safety laboratory in Shenzhen, China. 

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50% more energy into Li-ion batteries?

Fri, 11/04/2016 - 10:36 -- Xuan Zhong

The Energy research Centre of the Netherlands (ECN) claimed that using pure Silicon anode in lithium-ion battery cells is capable of increasing the energy density by 50%.

The new technology is commercialised by ECN’s spin-off company LeydenJar Technologies BV, and plan to set up a demonstration plant in the next two years.

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Korea sanctions investment to develop 300Wh/kg lithium-ion battery

Mon, 09/26/2016 - 10:57 -- Paul Crompton
Korea sanctions investment to develop 300Wh/kg lithium-ion battery

Korea is set to invest 43 billion won ($38.4 million) in a bid to double the energy density of lithium-ion batteries for the electric vehicle market by 2020, according to reports.

Developers plan to produce a 300Wh/kg battery, news outlet Korea Joongang Daily reported the country’s Ministry of Trade, Industry and Energy as saying.

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