Part1: Origins and Early Exploration of Technology
1.The Prototype of the Lithium Primary Battery
In the 1950s, the U.S. Department of Defense and NASA began researching high-energy-density batteries using metal fluorides as the cathode and lithium metal as the anode. However, lithium dendrite formation led to performance instability. A key conceptual advance came in 1962 when a team at Lockheed proposed a non-aqueous lithium electrolyte system, laying the groundwork for future development.
2.Breakthrough in lithium-ion rechargeable batteries
In 1972, Stanley Whittingham at ExxonMobil developed the first functional rechargeable lithium battery. It used layered titanium disulfide (TiS₂) as the cathode and lithium metal as the anode, operating at about 2.4V-significantly higher than contemporary nickel-cadmium batteries. However, the lithium metal anode tended to form dendrites during cycling, creating a safety risk that hindered commercialization.
3.Innovation in cathode materials
A major leap came in 1980 with John B. Goodenough's team's discovery of lithium cobalt oxide (LiCoO₂) as a cathode material. This material enabled a cell voltage of 4V and roughly doubled the energy density. While this breakthrough established the basis for modern high-energy-density batteries, it still relied on a lithium metal anode, leaving safety concerns unresolved.
Part2: Key Innovation
1 Replacement of the Anode Material
The critical step toward safe rechargeable batteries was replacing lithium metal. In 1982, Agarwal and Selman at the Illinois Institute of Technology discovered the intercalation of lithium ions into graphite. Building on this, researchers at Bell Labs created the first lithium-ion battery using a graphite anode, which suppressed dendrite growth. In 1985, Akira Yoshino assembled a practical prototype using petroleum coke (a carbon material similar to graphite) as the anode and lithium cobalt oxide as the cathode. This cell enabled the stable shuttling of lithium ions between electrodes, and Yoshino officially coined the term "lithium-ion battery."
2.Breakthrough in Electrolytes
A final major hurdle-cycle life-was overcome in 1987 when a Sony team discovered that an ethylene carbonate (EC)-based electrolyte enabled the formation of a stable Solid Electrolyte Interphase (SEI) film on the graphite anode surface. This protective layer prevents continuous electrolyte decomposition. Combining these innovations, Sony commercialized the world's first lithium-ion battery in 1991. It featured a lithium cobalt oxide cathode and a graphite anode, and its rapid adoption in camcorders and mobile phones ushered in the era of slim, portable electronics.
The following is a table:
三,Timeline of Lithium-ion Battery Development:
| years | event | Key Personnel/Company | significance |
|---|---|---|---|
| 1912 | The concept of lithium metal batteries was proposed. | Gilbert N. Lewis | The earliest research on the feasibility of lithium batteries |
| 1970S | Commercialization of primary lithium batteries (disposable) | Exxon,Moli Energy | Li/MnO₂, Li/SOCl₂, etc., have begun to be used on a large scale. |
| 1980 | The concept of a "rocking chair battery" has been proposed: lithium ions repeatedly insert and extract between the positive and negative electrodes. | Rachid Yazami(Lithium ions are intercalated in the negative electrode graphite) | Laying the theoretical foundation for modern lithium-ion batteries |
| 1983 | Rechargeable and dischargeable lithium-ion graphite anodes achieve | Rachid Yazami | Solved the lithium metal dendrite problem |
| 1985 | John B. Goodenough proposed the layered oxide cathode (LiCoO₂). | John B. Goodenough | High-voltage (~4V), high-capacity cathode materials emerge |
| 1989 | First prototype of LiCoO₂/graphite lithium-ion battery achieved | Akira Yoshino | A prototype of a truly safe and rechargeable lithium-ion battery |
| 1991 | Sony launches the world's first commercially available lithium-ion battery. | Sony + Asahi Kasei | With a capacity of 800mAh and a voltage of 3.6V, it was incorporated into the Sony CCD-TR1 camcorder, ushering in a new era of consumer electronics. |
| 1996 | Invention of lithium iron phosphate (LiFePO₄) cathode material | John B. Goodenough Team | Safer and longer lifespan, but with lower voltage (3.2V). |
| 1997 | Commercialization of lithium polymer batteries | Bellcore | Colloidal electrolytes can be made into ultra-thin soft packs. |
| 2001 | Ternary materials (LiNiCoMnO₂ / NCM) begin mass production | Multiple companies | Higher energy density, gradually replacing lithium cobalt oxide |
| 2008 | Tesla Roadster is the first to use 18650 lithium-ion batteries (Panasonic) in large quantities. | Panasonic + Tesla | Ushering in the Era of Electric Vehicles (Section 6876, 18650) |
| 2011 | High-nickel ternary (NCM811) successfully developed | Multiple companies | Energy density exceeds 250Wh/kg |
| 2015 | Silicon-carbon anodes begin small-scale applications | Amprius et al. | The negative electrode capacity has been increased from 360mAh/g to >420mAh/g. |
| 2019 | John B. Goodenough,Stanley Whittingham,Akira Yoshino, Nobel Prize in Chemistry | - | The official recognition of the contributions of lithium-ion batteries to humanity |
| 2020 | CATL Releases Module-Free CTP Technology | CATL | Volume utilization rate increased by 15-20%, cost decreased |
| 2021 | BYD Blade Battery (ultra-long lithium iron phosphate) enters mass production | BYD | Ultra-long battery cells with a length greater than 1m offer safety and high volumetric energy density. |
| 2022 | The first vehicle to feature a semi-solid-state battery (NIO ET7 150kWh pack) | welion | Energy density 360Wh/kg, transitioning to all-solid state |
| 2023 | Kirin Battery (CATL) + Solidified Battery (GAC) Released | CATL / GAC | The energy densities of the monomers are 255Wh/kg and 400Wh/kg (solidified in the laboratory), respectively. |
| 2024 | The first year of mass production of solid-state/semi-solid-state batteries: SAIC Smart Battery L6 (Qingtao), GAC (sulfide-based), etc. | Multiple companies | Energy density 350-400Wh/kg, 600+km range after 10 minutes of charging. |
| 2025 | Several 500Wh/kg-class solid-state batteries have announced mass production plans for 2026-2027. | Toyota, CATL, BYD, QuantumScape, etc. | With a range of 1000-1500km, single-cell batteries have become a reality, ushering in the "post-lithium-ion" era for lithium-ion batteries. |
四,Energy density evolution table:
| years | Mainstream cathode materials | Energy density (Wh/kg) | Representative models/products |
|---|---|---|---|
| 1991 | LiCoO₂ | 90-120 | Sony Camera |
| 2008 | LiCoO₂/NCA | 180-220 | Tesla Roadster |
| 2018 | NCM523/622 | 220-260 | Tesla Model 3 |
| 2021 | NCM811/High nickel | 260-300 | ET7, L9 |
| 2023 | High nickel + silicon-carbon | 300-350 | Kirin Battery,Tesla 4680 |
| 2025 | Semi-solid/Solid | 350-500+ | Zhiji L6, Toyota solid-state prototype vehicle |
