Graphene solid-state battery: Injecting new power into new energy vehicles

With advancements in technology, new energy vehicles are accelerating their development. The battery, the "heart" of a new energy vehicle, plays a decisive role in range and charging efficiency, while battery safety is a key factor and core performance indicator that restricts the development of new energy vehicles. Graphene batteries, with their ultralight, ultra-strong, ultra-conductive, and low-resistance characteristics, represent a breakthrough. Currently, with the rapid development of new energy vehicles, many companies are targeting the graphene battery field, aiming to seize the new high ground of solid-state batteries.

It has been learned that graphene is not only the world's hardest material with the highest thermal conductivity, but also the material with the lowest electrical resistance. It can be used to manufacture lightweight, durable batteries suitable for high-capacity energy storage, and can greatly shorten charging time, making it an ideal battery material. According to research, the energy storage capacity of graphene batteries can reach three times that of existing products, while also having a longer lifespan, shorter charging time, and safer performance, which can bring a qualitative leap to the cruising range of electric vehicles.

However, although graphene solid-state batteries are highly anticipated, graphene currently faces challenges in mass production and high production costs.

Zhu Guanghua, chief expert of Beijing Xuhua Times Technology Co., Ltd. (hereinafter referred to as "Xuhua Technology"), introduced that the curved graphene battery innovation technology has solved the above problems. These low-cost, mass-producible, well-dispersed, and structurally stable high-quality graphene materials are expected to unlock the application code of graphene solid-state batteries and open up new possibilities for the development of new energy vehicles.

Graphene, known as "black gold," is a pure carbon atom material extracted from graphite. Although as thin as a cicada's wing, it is surprisingly strong and has good electrical and thermal conductivity. With its broad application prospects in materials science, energy, and biomedicine, graphene is hailed as the "king of 21st-century materials."

Zhu Guanghua revealed that graphene itself has excellent electrical and thermal conductivity. The principle of a battery is the redox reaction between the positive and negative electrodes. In this process, graphene enters the battery plate as nanoparticles, filling the gaps with an "electronic bridge" method. Combined with graphene's high conductivity, the battery generates less heat resistance, resulting in lower energy loss, increased discharge capacity, and greatly improved charge and discharge efficiency.

It is understood that Xuhua Technology has achieved the industry's first mass production of curved graphene, solving the problems of high cost and inability to mass produce graphene, and achieving uniform size and excellent dispersibility.

Zhu Guanghua said that compared with traditional lithium batteries, under high thermal load conditions, the thermal conductivity of curved graphene is more prominent, and the solid electrolyte can effectively prevent short circuits and combustion risks that may be caused by liquid electrolytes.

For the industry, the main problem currently limiting the application of all-solid-state lithium batteries is the interfacial characteristics between the electrode and electrolyte materials. This is because it is difficult for the contact surface of solid materials to achieve the close contact effect of liquid batteries. Zhu Guanghua stated that curved graphene, due to its curved surface structure, can increase the contact area between the electrode and the electrolyte, improve interfacial contact, reduce interfacial impedance, and thus greatly improve the energy efficiency and power output of the battery.

Compared with traditional two-dimensional planar graphene materials, curved graphene, due to its three-dimensional structure and unique physicochemical properties, mainly improves electron conductivity, ion conductivity, optimizes interfacial contact, enhances structural stability, and improves energy density and safety in all-solid-state batteries.

Laboratory data from the Xuhua Battery research group shows that the energy density of curved graphene all-solid-state batteries exceeds 800Wh/kg, and after 6000 cycles at room temperature, its capacity can still maintain 85%, providing new methods and ideas for the development of high-energy-density all-solid-state batteries.

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