A rapid rise in battery innovation is playing a key role in clean energy transitions

Affordable and flexible electricity storage technologies are set to catalyse transitions to clean energy around the world, enabling cleaner electricity to penetrate a burgeoning range of applications. Between 2005 and 2018, patenting activity in batteries and other electricity storage technologies grew at an average annual rate of 14% worldwide, four times faster than the average of all technology fields, according to a new joint study published today by the European Patent Office (EPO) and the International Energy Agency.

The report, Innovation in batteries and electricity storage – a global analysis based on patent data, shows that batteries account for nearly 90% of all patenting activity in the area of electricity storage, and that the rise in innovation is chiefly driven by advances in rechargeable lithium-ion batteries used in consumer electronic devices and electric cars. Electric mobility in particular is fostering the development of new lithium-ion chemistries aimed at improving power output, durability, charge/discharge speed and recyclability. Technological progress is also being fuelled by the need to integrate larger quantities of renewable energy such as wind and solar power into electricity networks.

The joint study shows that Japan and Korea have established a strong lead in battery technology globally, and that technical progress and mass production in an increasingly mature industry have led to a significant drop in battery prices in recent years. Prices have declined by nearly 90% since 2010 in the case of lithium-ion batteries for electric vehicles, and by around two-thirds over the same period for stationary applications, including electricity grid management.

Developing better and cheaper electricity storage is a major challenge for the future. According to the IEA’s Sustainable Development Scenario, for the world to meet climate and sustainable energy goals, close to 10 000 gigawatt-hours of batteries and other forms of energy storage will be required worldwide by 2040 – 50 times the size of the current market.

“IEA projections make it clear that energy storage will need to grow exponentially in the coming decades to enable the world to meet international climate and sustainable energy goals. Accelerated innovation will be essential for achieving that growth,” said IEA Executive Director Fatih Birol. “By combining the complementary strengths of the IEA and the EPO, this report sheds new light on today’s innovation trends to help governments and businesses make smart decisions for our energy future.”

“Electricity storage technology is critical when it comes to meeting the demand for electric mobility and achieving the shift towards renewable energy that is needed if we are to mitigate climate change,” said EPO President António Campinos. “The rapid and sustained rise in electricity storage innovation shows that inventors and businesses are tackling the challenge of the energy transition. The patent data reveals that while Asia has a strong lead in this strategic industry, the US and Europe can count on a rich innovation ecosystem, including a large number of SMEs and research institutions, to help them stay in the race for the next generation of batteries.”

The joint study follows the publication earlier in September of the major IEA report Energy Technology Perspectives 2020, which has deepened the IEA’s technology analysis, setting out the challenges and opportunities associated with rapid clean energy transitions.

As governments and companies seek to make informed investments in clean energy innovation for the future, sector-specific insights like those offered by the joint study will be highly valuable, including for helping bring about a sustainable economic recovery from the Covid-19 crisis. The innovation study provides an authoritative overview of the technologies and applications receiving research attention – and of those that are underserved. It also shows where they stand in the competitive landscape.

Innovation is increasingly recognised as a core part of energy policy, and this year the IEA has been introducing more tools to help decision-makers understand the technology landscape and their role in it – and to track progress in innovation and the deployment of technologies. This includes a comprehensive new interactive guide to the market readiness of more than 400 clean energy technologies.

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