Nobel prize in chemistry awarded for work on lithium-ion batteries

John B Goodenough, M Stanley Whittingham and Akira Yoshino honoured for sparking a portable technology revolution

The Nobel prize in chemistry has been awarded to three scientists for their work in developing lithium-ion batteries.

John B Goodenough of the University of Texas at Austin, M Stanley Whittingham of Binghamton University and Akira Yoshino of Meijo University will receive equal shares of the 9m Swedish kronor (£74o,000) prize, which was announced by the Royal Swedish Academy of Sciences in Stockholm on Wednesday.

At 97 years old, Goodenough is the oldest laureate to receive a Nobel prize in any discipline; Whittingham is the second British-born researcher to win a science Nobel this year.

Lithium-ion batteries have long been tipped for the award, not least since they have proved pivotal in the development of the high-tech world we inhabit.

“They have laid the foundation of a wireless, fossil fuel-free society, and are of the greatest benefit to humankind,” the academy said.

Far lighter and more compact than earlier types of rechargeable battery, and able to hold their charge for longer, they are found in everything from mobile phones to laptops and electric cars.

“The [electric car] batteries no longer weigh two tonnes, but 300kg,” said Prof Sara Snogerup Linse, a member of the Nobel committee for chemistry. “The ability to store energy from renewable sources, the sun, the wind, opens up for sustainable energy consumption,” she added.

When asked how it felt to receive the call, Yoshino simply said: “Amazing, surprising.”

Speaking in an interview with the Times earlier this year, Goodenough said he had not appreciated the impact his work would have.

“At the time we developed the battery it was just something to do,” he said. “I didn’t know what electrical engineers would do with the battery. I really didn’t anticipate cellphones, camcorders and everything else.”

John B Goodenough
John B Goodenough at the Royal Society in London after hearing of his Nobel win. Photograph: Alastair Grant/AP

Wednesday was already expected to be a particularly good day for Goodenough – he is due to receive the prestigious Copley medal at the Royal Society in London in the evening, which recognises outstanding achievements in scientific research.

Goodenough, who slept through the announcement of the Nobel prize, learned of his win from a fellow scientist, Prof Maria Helena Braga of Porto University, who was also staying over at the Royal Society for the Copley dinner.

She burst into his room, exclaiming: “Wake up, wake up, you’ve won the Nobel prize!”. She said: “I had to show him on my phone about 20 times before he believed me.”

By Wednesday afternoon, having digested the news, Goodenough appeared at a press briefing and said that, while the Nobel was not something he had sought or expected, he was “very happy”. “Life is full of surprises,” he said, joking that at his age the prize “doesn’t make much difference”.

Goodenough, who still works in the lab every day, said he does not regret not having made a fortune for a discovery that has powered the portable electronics revolution. “I didn’t really care too much about the money,” he said. “Everything I’ve ever done, the lawyers end up with all the money.”

He added that he hoped the technology would continue to evolve to make electric cars more feasible. “We need to find a way to emancipate ourselves from dependence on burning fossil fuels,” he said.

Prof Mark Miodownik, a materials expert at University College London, said it was right that lithium-ion batteries were celebrated. “They are one of the most influential pieces of materials science that influence the modern life of everyone on the planet,” he said.

“It is remarkable too that although 30 years old, they have not been eclipsed by a better battery technology even now, which makes you realise what a remarkable discovery they are.”

M Stanley Whittingham
M Stanley Whittingham devised the first functional lithium battery in the 1970s. Photograph: Jonathan Cohen/Binghamton University/PA

Batteries work by turning chemical energy into electricity. A typical battery is made up of two electrodes, an anode and a cathode, which are usually separated by a liquid that can carry charged particles.

Both electrodes are connected to an electrical circuit. When the battery is powering an electrical device, electrons travel from the anode to the cathode through the electrical circuit, while positively charged ions move through the electrolyte. In a rechargeable battery, energy can be put into the device to reverse this process.

While rechargeable batteries were around in the 1970s, they had drawbacks, not least in the amount of energy they could store. Lithium, it was thought, could be an answer since it is a very light metal and easily loses an electron. However, lithium’s reactivity also made it tricky to harness.

In the 1970s Stanley Whittingham tackled the problem when looking to develop approaches for fossil-free energy in light of the oil crisis. His device, the first functional lithium battery, used lithium metal in the anode and lithium ions tucked into titanium disulphide for the cathode. Unfortunately, when this battery was repeatedly recharged, it ran the risk of exploding. To improve safety, Whittingham combined metallic lithium with aluminium in the anode.

Goodenough picked up the baton at the University of Oxford, and replaced the titanium disulphide in the cathode with cobalt oxide – an approach that doubled the voltage produced.

Yoshino used the cathode developed by Goodenough to create the first commercially viable lithium-ion battery in 1985, with the anode in his battery composed of lithium ions and electrons housed within a carbon material called petroleum coke. This made the battery much safer than those using lithium metal.

Akira Yoshino holds a model of his developed lithium-ion battery as he celebrates in Tokyo
Akira Yoshino holds a model of his developed lithium-ion battery as he celebrates his Nobel victory in Tokyo. Photograph: Kimimasa Mayama/EPA

The upshot was a lightweight, compact battery that could be recharged many, many times – the bedrock of modern technology. The battery continues to be developed, not least to improve its environmental impact.

Prof Dame Carol Robinson, president of the Royal Society of Chemistry, said battery technology remained an exciting field.

“It’s not the end of the journey, as lithium is a finite resource and many scientists around the world are building on the foundations laid by these three brilliant chemists,” she said.

On Monday, William Kaelin, Sir Peter Ratcliffe and Gregg Semenza won the 2019 Nobel prize in physiology or medicine for their work on understanding how cells adapt to low levels of oxygen, and on Tuesday the physics prize was shared between James Peebles, Michel Mayor and Didier Queloz for their work on cosmology and the discovery of the first exoplanet.

Two literature awards will be announced on Thursday after last year’s prize was postponed, the peace prize winner will be announced on Friday, followed by economics on Monday.


Nicola Davis and Hannah Devlin

The GuardianTramp

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