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Carbon-based anode could pave way to ultra-fast charging lithium-ion batteries.

Mon, 01/10/2022 - 10:07 -- Paul Crompton

Scientists from Japan Advanced Institute of Science and Technology (JAIST) have developed a new anode material that could overcome the slow charging times of conventional lithium-ion batteries.

The technology uses a carbon-based anode with ∼17 wt% of nitrogen doping (introduction of nitrogen impurities) with charging capability at 18.6 A g−1.

The findings could pave the way to fast-charging and durable batteries for electric vehicles as the industry looks to cut the charge time of EVs from around 40-minutes to be below 15 minutes. 

The team of scientists from JAIST was led by professor Noriyoshi Matsumi, and included: professor Tatsuo Kaneko; senior lecturer Rajashekar Badam,; JAIST technical specialist Koichi Higashimine; JAIST research fellow Yueying Peng, and JAIST student Kottisa Sumala Patnaik.

The team’s findings were published online in the journal Chemical Communications.

Professor Matsumi said: "The extremely fast charging rate with the anode material we prepared could make it suitable for use in EVs. Much shorter charging times will hopefully attract consumers to choose EVs rather than gasoline-based vehicles, ultimately leading to cleaner environments in every major city across the world."

New battery material

The precursor material for the anode is poly (benzimidazole), a bio-based polymer that can be synthesized from raw materials of biological origin was calcinated at 800°C. 

Durability tests using half-and full-cells showed the proposed anode material retained around 90% of its initial capacity after 3,000 charge-discharge cycles at high rates.

The researchers verified the successful synthesis of the material and studied its composition and structural properties using a variety of techniques, including: scanning electron tunneling microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy.

A method being investigated to cut charge times is increasing the diffusion rate of lithium ions, which in turn can be done by increasing the interlayer distance in the carbon-based materials used in the battery's anode. 

While this has been achieved with some success by nitrogen doping there is no method easily available to control interlayer distance or to concentrate the doping element.

Modifications to the structure of the polymer precursor could lead to even better performance, which might be relevant for the batteries not only of EVs, but also of portable electronics. 

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Pilot plant opens to produce lithium-ion battery anode materials from trees

Fri, 08/13/2021 - 16:53 -- Paul Crompton
Lignose powder

Renewable materials company Stora Enso has started producing wood-based carbon for lithium-ion batteries at its pilot facility in Finland.

The pilot facility is ramping up production to supply anode materials that replace the synthetic and non-renewable graphite following a €10 million ($11.8 million) investment in 2019.

The wood-based carbon material will have a number of applications, including electric vehicles and consumer electronics as well as large-scale energy storage systems.

The plant will produce Lignode, which is made from lignin, a existing by-product in the production of cellulose fibre and naturally occurring in trees.

Markus Mannström, executive vice president of Stora Enso’s Biomaterials division, said: “With our pilot plant now ramping up operations, we are entering a new value chain in supplying more sustainable anode materials for batteries. 

“With Lignode, we can provide a bio-based, cost-competitive and high-performance material to replace the conventionally used graphite. To serve the fast-growing anode materials market, we are now exploring strategic partnerships to accelerate scale-up and commercialisation in Europe.”

The pilot plant for bio-based carbon materials is located at Stora Enso’s Sunila production site in Finland, where lignin has been industrially produced since 2015. 

The bio-refinery’s annual lignin production capacity is 50,000 tonnes, making Stora Enso the largest kraft lignin producer in the world. 

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Carbon recovery trials puts EcoGraf a step closer to entering the lithium-ion battery supply chain

Tue, 03/31/2020 - 12:59 -- Paul Crompton

Australian battery materials firm Ecograf has announced it can recover 99% of the carbon from used battery feedstock following trials of its lithium-ion anode recycling process.

The firm’s proprietary graphite purification technology was trialled on recycled lithium-ion battery material, which included anode material consisting of natural and synthetic graphite and silicon. =

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Lead batteries best on environmental footprint

Mon, 01/29/2018 - 10:54 -- News Editor
Lead batteries best on environmental footprint

The use of lead batteries in advanced hybrid and electric vehicles is likely to contribute significantly to carbon foot print reduction, according to Alistair Davidson of the International Lead Association (ILA).

Speaking at the Advanced Automotive Battery Conference in Mainz Germany this week, Dr Davidson, director of products and sustainability at ILA, explained that life cycle assessment of the use of lead batteries gave a doubled benefit to the environment in terms of 99% collection and recycling rate, coupled with reduced emissions from automobiles from technologies such as start-stop and micro-hybrid applications.

 

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Single-wall nanotubes prove a breakthrough in lead-acid batteries

Tue, 05/31/2016 - 14:00 -- Paul Crompton
Single-wall nanotubes prove a breakthrough in lead-acid batteries

Single-wall carbon nanotubes (SWCNT) that can quadruple the cycle life of lead-acid batteries were showcased at the world’s largest battery show in China last week.

The Tuball™ nanotubes additive have also been shown to double capacity at high discharge rates and have an increase of capacity of 30%, claims the material’s producer, Israel-based OCSiAl.

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Stanford team reveals carbon-coated lithium anode

Wed, 07/30/2014 - 10:37 -- Laura Varriale
carbon for a battery anode

Researchers at Stanford University have created a carbon-coated lithium anode, which has performed 150 charge/discharge cycles without forming dendritic spines at 99% Columbic efficiency.

The team placed layers of amorphous carbon to form a protective coat around the lithium anode, thus allowing it to expand and contract without causing dendritic growth at the electrolyte-electrode interface, claimed the Stanford team in a research paper published in Nature Nanotechnology.

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German materials firm Heraeus launches conductive porous carbon powders for lithium-ion battery electrodes

Mon, 09/23/2013 - 10:49 -- Editor

German materials engineering firm Heraeus has launched Porocarb, a family of conductive porous carbon powder to improve ionic conductivity in electrodes for lithium-ion batteries.

A team of developers from the new product group led by Christian Neumann spent more than three years developing these novel carbon particles with pore-size distribution ranging from 10 and 1,000 nanometers and internal pore volumes up to 2.5 cubic centimetres per gramme.

"The pore size gap between carbon felts in the low micrometer range and mesoporous carbons with pore sizes is lower than 50 nanometers, thus opening up new areas of application," said Neumann.

“Porocarb could be used as an additive to improve the performance of lithium-ion batteries as well as a catalyst support for fuel-cells. This new product makes it possible to increase the capacity of lithium-ion batteries in smart phones without increasing the size of the battery or to make the battery even smaller without affecting capacity."

When Porocarb powder is added to electrode slurries, high-porosity areas remain after the electrode compression. This leads to more effective ion kinetics while keeping the overall electrode density high, making it possible to double the thickness of the electrode layer without lowering performance, says Neumann.

Porocarb is based on Heraeus’ experience of manufacturing synthetic fused silica. Carbonaceous precursors are deposited on all porous inner surfaces of the silica template, which is separated chemically from the self-similar carbon framework that has developed.

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