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A dual carbon battery is a type of battery that uses graphite (or carbon) as both its cathode and anode material. Compared to lithium-ion batteries, dual-ion batteries (DIBs) require less energy and emit less CO2 during production, have a reduced reliance on critical materials such as Ni or Co, and are more easily recyclable.
Dual-carbon (also called dual-graphite) batteries were first introduced in a 1989 patent. [1] They were later studied by various other research groups. [2]
In 2014, start-up Power Japan Plus announced plans to commercialize its version, named the Ryden. Dual Carbon Battery Technology has been developed by joint research between Power Japan Plus Inc. and Dr. Tatsumi Ishihara, professor of Kyushu University. Power Japan Plus has completed development of a proof of concept of Organic Dual Carbon Battery as coin cells in 2014.
Co-lead Kaname Takeya is known for his work on the Toyota Prius and Tesla Model S. [3] The company claimed that its cell offers energy density comparable to a lithium-ion battery, more rapid charge rate, a longer functional lifetime (3k cycles), improved safety and cradle-to-cradle sustainability. The company claimed that its battery charges 20 times faster than conventional lithium ion batteries, is rated for more than 3,000 cycles and can slot directly into existing manufacturing processes, without changes to existing manufacturing lines. [2]
In June 2017, PJP Eye LTD. acquired Power Japan Plus's battery business and all of its R&D facility and equipment, intellectual property and patents, and other assets.
Currently, PJP Eye LTD. continues development of Organic Dual Carbon Battery and completed proof of concept of the battery as laminated cells. PJP Eye has mass-produced Organic Single Carbon Battery based on Organic Dual Carbon Technology in 2017. It has been integrated into various applications from personal mobilities, drones to storages. PJP Eye LTD. plans to mass-produce and start commercialization of Organic Dual Carbon Battery which brand name is "Cambrian Dual" by 2023 to integrated them into EVs and electric airplanes.
As an electrolyte, the cell uses one or more lithium salts in an aprotic organic solvent. These remain unspecified, but as an example in a patent, the group uses a system consisting of lithium hexafluorophosphate (LiPF
6) as the salt, and ethylene carbonate (EC) and dimethyl carbonate (DMC), mixed in a 1:2 volume ratio, as solvent.
Both electrodes are based on graphitic carbon. Graphite with the right grain size is obtained by pyrolyzing cotton.
Precipitation and dissolution of a lithium salt takes place at any location where the electrolyte is present. However, increased precipitation on electrode surfaces decreases power density because the salt in a solid state is an insulator. One element of the company's patent introduces a method to prevent such precipitation. This also improves the battery's specific energy. [2]
The battery can fully discharge without the risk of short-circuiting and damaging the battery. The battery operates without heating at room temperature, avoiding the extensive cooling systems that appear in current electric cars and the corresponding risk of thermal runaway. It operates at over four volts. The battery is fully recyclable. The electrodes are made from cotton, to better control the crystal size. [4]
A separate research project used the same salt and a high voltage aprotic electrolyte based on a fluorinated solvent and additive, which was capable of supporting the chemistry at 5.2 V with high efficiency. Enough electrolyte salt is needed in the cell to guarantee conductivity, and enough solvent must be available to enable the salt to dissolve at any level of charge/discharge. [2]
Lithium ions dispersed in the electrolyte are inserted/deposited into/on the anode during charge, as in other lithium ion batteries. Unusually, ions (anions) from the electrolyte are intercalated into the cathode at the same time. During discharge, both anions and lithium ions return to the electrolyte. The electrolyte in such a system thus acts as both charge carrier and active material. [2]
Capacity is determined by the storage capacity and amount of ion release of the electrodes and the amount of anions and cations in the aprotic electrolyte. [2]
In following lines, → is the charging reaction and ← is the discharging reaction.
Positive electrode:
Negative electrode:
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit. Electrodes are essential parts of batteries that can consist of a variety of materials depending on the type of battery.
A lithium-ion or Li-ion battery is a type of rechargeable battery which uses the reversible reduction of lithium ions to store energy. The negative electrode of a conventional lithium-ion cell is typically graphite, a form of carbon. This negative electrode is sometimes called the anode as it acts as an anode during discharge. The positive electrode is typically a metal oxide; the positive electrode is sometimes called the cathode as it acts as a cathode during discharge. Positive and negative electrodes remain positive and negative in normal use whether charging or discharging and are therefore clearer terms to use than anode and cathode which are reversed during charging.
A lithium polymer battery, or more correctly lithium-ion polymer battery, is a rechargeable battery of lithium-ion technology using a polymer electrolyte instead of a liquid electrolyte. High conductivity semisolid (gel) polymers form this electrolyte. These batteries provide higher specific energy than other lithium battery types and are used in applications where weight is a critical feature, such as mobile devices, radio-controlled aircraft and some electric vehicles.
A flow battery, or redox flow battery, is a type of electrochemical cell where chemical energy is provided by two chemical components dissolved in liquids that are pumped through the system on separate sides of a membrane. Ion transfer inside the cell occurs through the membrane while both liquids circulate in their own respective space. Cell voltage is chemically determined by the Nernst equation and ranges, in practical applications, from 1.0 to 2.43 volts. The energy capacity is a function of the electrolyte volume and the power is a function of the surface area of the electrodes.
Lithium tetrafluoroborate is an inorganic compound with the formula LiBF4. It is a white crystalline powder. It has been extensively tested for use in commercial secondary batteries, an application that exploits its high solubility in nonpolar solvents.
Lithium hexafluorophosphate is an inorganic compound with the formula LiPF6. It is a white crystalline powder.
A polymer-based battery uses organic materials instead of bulk metals to form a battery. Currently accepted metal-based batteries pose many challenges due to limited resources, negative environmental impact, and the approaching limit of progress. Redox active polymers are attractive options for electrodes in batteries due to their synthetic availability, high-capacity, flexibility, light weight, low cost, and low toxicity. Recent studies have explored how to increase efficiency and reduce challenges to push polymeric active materials further towards practicality in batteries. Many types of polymers are being explored, including conductive, non-conductive, and radical polymers. Batteries with a combination of electrodes are easier to test and compare to current metal-based batteries, however batteries with both a polymer cathode and anode are also a current research focus. Polymer-based batteries, including metal/polymer electrode combinations, should be distinguished from metal-polymer batteries, such as a lithium polymer battery, which most often involve a polymeric electrolyte, as opposed to polymeric active materials.
Nanobatteries are fabricated batteries employing technology at the nanoscale, particles that measure less than 100 nanometers or 10−7 meters. These batteries may be nano in size or may use nanotechnology in a macro scale battery. Nanoscale batteries can be combined to function as a macrobattery such as within a nanopore battery.
A lithium-ion capacitor is a hybrid type of capacitor classified as a type of supercapacitor. It is called a hybrid because the anode is the same as those used in lithium-ion batteries and the cathode is the same as those used in supercapacitors. Activated carbon is typically used as the cathode. The anode of the LIC consists of carbon material which is often pre-doped with lithium ions. This pre-doping process lowers the potential of the anode and allows a relatively high output voltage compared to other supercapacitors.
The lithium–sulfur battery is a type of rechargeable battery. It is notable for its high specific energy. The low atomic weight of lithium and moderate atomic weight of sulfur means that Li–S batteries are relatively light. They were used on the longest and highest-altitude unmanned solar-powered aeroplane flight by Zephyr 6 in August 2008.
The lithium–air battery (Li–air) is a metal–air electrochemical cell or battery chemistry that uses oxidation of lithium at the anode and reduction of oxygen at the cathode to induce a current flow.
A potassium-ion battery or K-ion battery is a type of battery and analogue to lithium-ion batteries, using potassium ions for charge transfer instead of lithium ions. It was invented by the Iranian/American chemist Ali Eftekhari in 2004.
The sodium-ion battery (NIB or SIB) is a type of rechargeable battery that uses sodium ions (Na+) as its charge carriers. In some cases, its working principle and cell construction are similar to those of lithium-ion battery (LIB) types, but it replaces lithium with sodium as the cathode material, which belongs to the same group in the periodic table as lithium and thus has similar chemical properties.
A supercapacitor (SC), also called an ultracapacitor, is a high-capacity capacitor, with a capacitance value much higher than other capacitors but with lower voltage limits. It bridges the gap between electrolytic capacitors and rechargeable batteries. It typically stores 10 to 100 times more energy per unit volume or mass than electrolytic capacitors, can accept and deliver charge much faster than batteries, and tolerates many more charge and discharge cycles than rechargeable batteries.
Aluminium-ion batteries are a class of rechargeable battery in which aluminium ions serve as charge carriers. Aluminium can exchange three electrons per ion. This means that insertion of one Al3+ is equivalent to three Li+ ions. Thus, since the ionic radii of Al3+ (0.54 Å) and Li+ (0.76 Å) are similar, significantly higher numbers of electrons and Al3+ ions can be accepted by cathodes with little damage. Al has 50 times (23.5 megawatt-hours m-3) the energy density of Li and is even higher than coal.
Research in lithium-ion batteries has produced many proposed refinements of lithium-ion batteries. Areas of research interest have focused on improving energy density, safety, rate capability, cycle durability, flexibility, and cost.
Lithium–silicon battery is a name used for a subclass of lithium-ion battery technology that employs a silicon-based anode and lithium ions as the charge carriers. Silicon based materials generally have a much larger specific capacity, for example 3600 mAh/g for pristine silicon, relative to graphite, which is limited to a maximum theoretical capacity of 372 mAh/g for the fully lithiated state LiC6. Silicon's large volume change (approximately 400% based on crystallographic densities) when lithium is inserted is one of the main obstacles along with high reactivity in the charged state to commercializing this type of anode. Commercial battery anodes may have small amounts of silicon, boosting their performance slightly. The amounts are closely held trade secrets, limited as of 2018 to at most 10% of the anode. Lithium-silicon batteries also include cell configurations where Si is in compounds that may at low voltage store lithium by a displacement reaction, including silicon oxycarbide, silicon monoxide or silicon nitride.
Magnesium batteries are batteries that utilize magnesium cations as the active charge transporting agents in solution and often as the elemental anode of an electrochemical cell. Both non-rechargeable primary cell and rechargeable secondary cell chemistries have been investigated. Magnesium primary cell batteries have been commercialised and have found use as reserve and general use batteries.
This is a history of the lithium-ion battery.
Superconcentrated electrolytes, also known as water-in-salt or solvent-in-salt liquids, usually refer to chemical systems, which are liquid near room temperature and consist of a solvent-to-dissoved salt in a molar ratio near or smaller than ca. 4-8, i.e. where all solvent molecules are coordinated to cations, and no free solvent molecules remain. Since ca. 2010 such liquid electrolytes found several applications, primarily for batteries. In the case of lithium metal batteries and lithium-ion batteries most commonly used anions for superconcentrated electrolytes are those, that are large, asymmetric and rotationally-vibrationally flexible, such bis(trifluoromethanesulfonyl)amide and bis(fluorosulfonyl)amide. Noteworthy, lithium chloride and sodium perchlorate also form water-in-salt solutions.
