In the past two years, graphene batteries, sodium-ion batteries, and solid-state batteries have frequently appeared on trending topics, with various "cutting-edge technology" advertisements dazzling the public. Many people mistakenly believe these are entirely new battery types, even thinking they can "revolutionize existing technology." In fact, these batteries didn't appear out of thin air; some are improvements on existing battery technologies, while others are upgrades or replacements for lithium batteries. Today, we'll unveil their true nature and stop being misled by these concepts.
Graphene Batteries
Not a new battery, but merely a "performance enhancer" for lead-acid/lithium batteries. Many people hear "graphene battery" and think it's a completely new, cutting-edge battery technology. This is a misconception: graphene batteries are not an independent battery type, but rather a battery improvement technology.
Currently, most graphene batteries advertised on the market are simply traditional lead-acid or lithium batteries with a small amount of graphene or its derivatives added as a conductive agent to the electrode materials. Leveraging graphene's excellent electrical and thermal conductivity, it can improve battery charging speed, rate performance, high-power charge/discharge capabilities, and cycle life. Simply put, it makes ordinary batteries "more rechargeable, more durable, and less prone to overheating."
However, true graphene-based batteries are currently in the laboratory research and development stage and are far from commercialization. Most related marketing claims are exaggerated; they are essentially upgraded versions of lead-acid or lithium-ion batteries.
Applicable scenarios: Primarily used in two-wheeled electric vehicles and low-speed commuter vehicles. Compared to ordinary lead-acid batteries, charging speed can be increased by 2-3 times, cycle life increases from 300 cycles to 600-800 cycles, and low-temperature performance is also improved. Moreover, the price is between that of ordinary lead-acid and lithium-ion batteries, offering excellent cost-effectiveness. However, in the field of new energy vehicles, the energy density ceiling of graphene batteries is too low to meet the demands of long-range driving, therefore, they are rarely adopted by automakers.
Sodium-ion batteries
The working principle is basically the same as lithium batteries; both achieve charging and discharging through the movement of ions between the positive and negative electrodes. The core difference is that the "lithium" in lithium batteries is replaced with "sodium."
Its positive electrode material is a sodium-containing compound, the negative electrode material is mostly hard carbon, and the electrolyte is sodium salt. The raw materials are completely different from lithium batteries, but the working logic is highly similar. Because of this, sodium-ion batteries perfectly inherit the advantages of lithium batteries and also make up for many of their shortcomings. Their core advantages are particularly prominent:
Extremely Low Cost: Sodium is the sixth most abundant element in the Earth's crust, readily available in seawater and salt lakes. It is abundant and evenly distributed, and its price is far lower than lithium, fundamentally reducing battery costs.
Better Safety: It has higher thermal stability and is less prone to thermal runaway. In safety tests such as overcharge, short circuit, and nail penetration, it performs better than lithium batteries.
Exceptional Low-Temperature Performance: This is the most outstanding advantage of sodium-ion batteries. In extremely cold environments such as -20℃ or even -40℃, it can still maintain more than 90% of its capacity, while lithium batteries generally retain less than 70% of their capacity at -20℃, perfectly solving the problem of "halved battery life" in northern winters. The pain points;
Good rate performance: Fast charging and discharging speed, adaptable to fast charging needs, and lower requirements for charging equipment.
ACEY-BCT520-256H Battery Charge Discharge Tester is designed for testing the charging and discharging performance of cylindrical lithium cells. It accurately measures parameters such as capacity, voltage, current, and supports programmable charge–discharge cycles for performance evaluation and quality control.
Current status: 2026 is a key year for the accelerated large-scale commercialization of sodium-ion batteries. They have already been implemented in light commercial vehicles, passenger vehicles, and energy storage: CATL has launched mass-produced sodium-ion batteries for light commercial vehicles, and Changan Automobile's world's first mass-produced sodium-ion passenger vehicle is also planned for launch this year. In the energy storage field, sodium batteries are also used in high-altitude, low-temperature environment energy storage stations, coal mine emergency power supplies, and other scenarios. In the future, sodium-ion batteries and lithium batteries will form a "sodium-lithium duopoly," each meeting the needs of different market segments: lithium batteries will focus on high-end, long-range performance, while sodium-ion batteries will focus on low cost and low-temperature applications.
Solid-state batteries
The "ultimate dream" of battery technology, a pinnacle of safety and performance.
Solid-state batteries represent the current "ceiling" of battery technology, often referred to as the "ultimate dream." They don't depart from the lithium-ion battery system, but rather represent a revolutionary upgrade to existing liquid lithium-ion batteries. The core change is the replacement of the flammable liquid electrolyte in lithium-ion batteries with a non-flammable solid electrolyte.
Solid-state batteries can utilize the same or upgraded lithium-ion battery technology for their positive and negative electrode materials. While lithium ions still move between the electrodes, the conduction channel changes from liquid to solid. This transformation allows solid-state batteries to achieve a "double leap" in performance and safety, with core advantages that are virtually perfect:
Extreme Safety: Solid-state electrolytes are non-flammable and leak-proof, fundamentally solving the safety hazards of fire and explosion in lithium-ion batteries. They pass the nail penetration test 100%, eliminating both range anxiety and safety anxiety.
Huge Energy Density Potential: Solid-state batteries can directly use metallic lithium as the negative electrode, instead of the graphite negative electrode used in lithium-ion batteries. Metallic lithium is the ultimate negative electrode material, increasing battery energy density by an order of magnitude. Laboratory products have already achieved energy densities exceeding 600Wh/kg, easily enabling future electric vehicles to easily exceed 1000km, or even 1500km of range.
Longer Cycle Life: The solid-state system effectively suppresses the growth of lithium dendrites, which are the main culprits behind short circuits and battery life degradation caused by piercing the separator. Solid-state batteries can easily achieve a cycle life exceeding 2000 cycles. Solid-state batteries can operate at temperatures as low as -40°C and as high as 800°C, requiring no complex thermal management system and saving battery pack space.
In the future, solid-state batteries will be first applied in luxury electric vehicles, aerospace, and high-end consumer electronics, where extreme demands for range and safety are paramount. Large-scale commercialization is expected around 2030, gradually upgrading and replacing liquid lithium batteries, starting from the high-end market.
about us
In the process of new energy batteries moving from the laboratory to industrialization and large-scale application, Acey Intelligent Equipment has consistently played the role of a "full-process partner." As a new energy technology company with high-end equipment at its core, we provide full life-cycle support, from experimental development to mass production, to battery companies, universities, research institutes, and innovative energy organizations worldwide.
We not only excel in the R&D and manufacturing of precision laboratory equipment and pilot-scale verification platforms, but also possess the capabilities for large-scale mass production plant planning, equipment integration, installation, commissioning, and hands-on training. This truly achieves a seamless transition from "a material sample" to "a smart factory," ensuring that every innovative idea can be efficiently implemented.