The proliferation of electric cars, smartphones, and portable devices is leading to an estimated 25 percent increase globally in the manufacturing of rechargeable batteries each year. Many raw materials used in the batteries, such as cobalt, may soon be in short supply. The European Commission is preparing a new battery decree, which would require the recycling of 95 percent of the cobalt in batteries. Yet existing battery recycling methods are far from perfect.Researchers at Aalto University have now discovered that electrodes in lithium batteries containing cobalt can be reused as is after being newly saturated with lithium. In comparison to traditional recycling, which typically extracts metals from crushed batteries by melting or dissolving them, the new process saves valuable raw materials, and likely also energy. ‘In our earlier study of how lithium cobalt oxide batteries age, we noticed that one of the main causes of battery deterioration is the depletion of lithium in the electrode material. The structures can nevertheless remain relatively stable, so we wanted to see if they can be reused,’ explains Professor Tanja Kallio at Aalto University. Tiếp tục đọc “Battery parts can be recycled without crushing or melting”
- A recent growth in targets for ambitious clean energy use and net zero greenhouse gas emissions has increased interest in the role of utility-scale storage, including long-duration energy storage, to achieve deep decarbonization of the power sector.
- In future deep-decarbonization scenarios, energy storage holds the potential to address multiday weather-related events that lower the production of renewable energy, as well as seasonal differences in renewable energy resource availability that can last for weeks.
- Today’s storage technologies provide only hours of storage, though with design and operational changes, compressed air energy storage and pumped hydro storage capacity could be stretched into days.
- Other, less mature storage technologies may evolve to provide long-duration storage that compensate for seasonal variations in renewable energy supply, for example, technologies that create hydrogen through low-carbon processes.
- Recent storage deployments in the United States have been driven by state storage mandates, utility investment, frequency regulation markets and declining battery costs.
- Policymakers can play an important role in driving innovation, encouraging cost reductions and assessing the benefits of storage to provide greater options for maintaining reliability in future decarbonized grids through research and development, demonstration projects and regional studies. New approaches to financing, planning and procurement could reduce barriers to the adoption of long-duration storage technologies.
The energy storage market in the United States is booming, with 476 megawatts of new projects installed in the third quarter of 2020 alone, up 240 percent over the second quarter, according to industry analysts at Wood Mackenzie. 2021 is expected to be another record-breaking year for storage, but with technological innovation accelerating across the market, renewable energy asset owners need to carefully select safe and reliable systems to protect their storage investments. As the market accelerates, these are a few of the essential questions asset owners should be asking.
1. Evaluate pricing beyond the cell
When analysts speak about declines in storage pricing, they are referring to battery pricing, which continues to decline every year. Bloomberg New Energy Finance’s latest report states that current lithium-ion pricing stands at about $137 per kilowatt-hour and will drop as low as $100 per kWh by 2023.
However, purchasers of energy storage systems may see substantially higher prices for their projects, depending on a range of factors. For example, the lowest pricing for lithium-ion batteries is generally available for either a major supply contract or for very large-scale deployments of 500 megawatt-hours and above. Since most projects today are not that large, that $137 per kWh figure will be closer to $150 to $170 per kWh, and perhaps as high as $200 to $210 per kWh on the battery-pack level, depending on the size of the project.
Tiếp tục đọc “Beyond Declining Battery Prices: 6 Ways to Evaluate Energy Storage in 2021”
The deployment of battery energy storage systems (BESS) is rapidly increasing throughout the world. This technology presents many opportunities for increasing contributions of variable renewable energy technologies, providing ancillary services, enabling energy access to remote areas, and increasing resilience during grid power outages. At the same time, BESS has not been widely deployed and operated in many contexts. The use of BESS requires codes and standards similar to those for other inverter-based technologies but may also necessitate special safety considerations in specific contexts. As countries in Asia consider the inclusion of BESS in their power systems to meet policy objectives, renewable energy goals, increase resilience, and expand energy access, there is an opportunity to learn from the experiences of other regions and jurisdictions that have developed more advanced storage markets and practices.
This report presents global best practices of codes, standards, and interconnection procedures developed to support the safe and reliable deployment of BESS. Several relevant case studies highlight current efforts to ensure safe operation of BESS and showcase potential pathways for adoption of relevant codes and standards. Specifically, this report is intended to support the Thailand Office of Energy Regulatory Commission (OERC) and other stakeholders in their efforts to develop technical codes and standards to govern the installation and operation of BESS; it may also be utilized as a guide for other countries as interest in the deployment of BESS technologies continues to grow. Coupled with well-defined regulatory objectives, market incentives, permitting procedures, and technical review processes, the adoption of technical codes and standards that govern the design, construction, installation, and operation of BESS can help provide regulatory certainty, as well as reduce barriers to investment. Such codes and standards also ensure BESS deployment will meet national, regional, and local goals, while maintaining a reliable grid, and ensuring public safety.
Finally, a robust BESS market can support the increased adoption of variable renewable energy generation technologies to meet Thailand’s energy portfolio goals. This report has been prepared by the National Renewable Energy Laboratory (NREL) with support from the U.S. Agency for International Development (USAID) Regional Development Mission for Asia, and in collaboration with USAID Clean Power Asia.
Download full report https://www.nrel.gov/docs/fy21osti/78780.pdf
Storing renewable energy in batteries and pumped storage of water to generate power, and improving transmission capacity are keys for Vietnam to foster renewable energy, according to experts.
Nguyen Duc Ninh, director of the National Load Dispatch Center, said earlier this month Vietnam plans to reduce its renewable energy output by 1.3 billion kilowatt hours this year since it lacks transmission capacity.
Installed solar power capacity reached 19,400 MWp by the end of last year, or 25 percent of total power capacity.
Dr Hang Dao, a sustainable energy expert at the World Resources Institute (WRI), said the reason Vietnam has solar energy surplus is the country’s electric grid and infrastructure are quite weak, and so energy is not transmitted to locations where needed.
The national grid is out of date and needs to be upgraded, but it would take time to install a modern network, and while waiting for it the country could focus on short-term storage plans, said Hang.
Battery storage costs have evolved rapidly over the past several years, necessitating an update to storage cost projections used in long-term planning models and other activities. This work documents the development of these projections, which are based on recent publications of storage costs. The projections show a wide range of storage costs, both in terms of current costs as well as future costs. Although the range in projections is considerable, all projections do show a decline in capital costs, with cost reductions by 2025 of 10-52%. The cost projections developed in this work utilize the normalized cost reductions across the literature, and result in 21-67% capital cost reductions by 2030 and 31-80% cost reductions by 2050. The cost projections are also accompanied by assumed operations and maintenance costs, lifetimes, and round-trip efficiencies, and these performance metrics are benchmarked against other published values.
Download full report https://www.nrel.gov/docs/fy19osti/73222.pdf