Solar Energy

Tripling renewable energy by 2030 ‘ambitious but doable’

Published

1 year ago

November 30, 2023

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Tripling renewable energy by 2030 ‘ambitious but doable’

By Catherine HOURS

Paris (AFP) Nov 30, 2023

Host United Arab Emirates wants nearly 200 nations attending the COP28 climate summit starting Thursday to commit to tripling installed renewable energy capacity worldwide by 2030, a goal experts say is “ambitious but achievable”.

If the UN forum sets that target in stone, it could become a key marker of COP28’s success, especially if coupled with a pledge to drawn down fossil fuel use.

– Why triple renewable energy? –

In September, the G20 — accounting for 80 percent of global greenhouse gas emissions — broke new ground in endorsing the goal of tripling renewable energy capacity by the end of the decade.

The club of major economies remained silent, however, on the need to reduce fossil fuel use, which will also be on the table during the two-week meeting in Dubai.

For Dave Jones, an expert with think tank Ember, the G20’s statement has helped push renewables back to centre stage.

“We were too busy worrying about hydrogen and carbon capture,” he told AFP. “Those technologies are going to help solve the problem, but they are not going to be the driving force behind the solution.”

All credible pathways for achieving global carbon neutrality by mid-century depend on massively scaling up wind, solar, hydroelectric and other renewable energies, such as biomass.

This is “the single most important lever” for reducing carbon pollution from burning fossil fuels, and capping warming under the Paris Agreement threshold of 1.5 degrees Celsius compared with the pre-industrial period, the International Energy Agency (IEA) has said.

“Achieving net zero emissions from the energy sector by 2050 rests on the world’s ability to triple renewable energy capacity by 2030,” the intergovernmental body said in a recent report.

Doing so would avoid some seven billion tonnes of CO2 emissions over the next seven years, putting a big dent in the 37 billion tonnes that the world currently emits every year.

Rapid expansion of renewables would cover skyrocketing demand for electricity linked to transport, heating and especially air conditioning.

It would also cut in half the amount of electricity generated by coal, the number one source of CO2.

– How much energy? –

“Concretely, we’d need to increase from 3,600 gigawatts (GW) from renewables at the end of 2022 to 11,000 GW in 2030,” explained Jones.

That would mean adding 1,500 GW of new installed capacity every year by 2030, up from 300 GW in 2022 and an estimated 500 GW in this year.

Progress is visible. Between 2015 and 2022, renewable capacity increased 11 percent per year, on average.

Against a backdrop of soaring oil prices and energy insecurity linked to the war in Ukraine, the IEA forecasts unprecedented growth of about 30 percent in 2023.

China could reach its 2030 target of 1,200 GW capacity from photovoltaics five years early. A surge in the supply of components — mostly from China — could help ensure an additional 1,000 GW of solar capacity by the end of next year, Jones said.

Wind power, however, has hit obstacles in the form of rising costs and interest rates.

Not all countries will have to make the same efforts to slash emissions. Of 57 nations analysed, more than half were on track to meet or exceed their 2030 targets, the Ember analysis points out.

But other large emitters such as Australia, Japan, South Korea and United Arab Emirates still have lots of room for improvement.

– How can this be achieved? –

Last year, 1,000 GW of wind and solar power capacity in the pipeline failed to materialise due to underdeveloped electricity grids and obstacles to permitting, according to the Ren21 research network.

Another bottleneck is finance. Wind and solar are the cheapest way to generate energy and are quick to deploy, but require investment to get off the ground, particularly in emerging and developing countries.

And yet only two percent of energy transition investment between 2000 and 2020 went to Africa, where half the population still lacks electricity, according to the Renewable Energy Agency (Irena).

“We need four trillion dollars a year and we’re a long way from that,” said Ren21 director Rana Adib. “We know that the energy transition also means stopping new investment in fossil fuels”.

In 2022, hydrocarbons were subsidised twice as much as in 2021 to the tune of nearly $1.3 trillion in G20 countries alone, according to BloombergNEF.

This “could have financed 1,900 GW of solar power plants, or ten times the capacity installed by the G20 last year,” the energy think tanks calculated.

The consequence of this situation is clear, insisted Adib, with oil, gas and coal still accounting for more than 80 percent of the world’s final energy consumption, a rate that has not changed for years.

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Solar Energy

Breakthrough new material brings affordable, sustainable future within grasp

Published

10 hours ago

December 22, 2024

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Breakthrough new material brings affordable, sustainable future within grasp

by Rashda Khan for Canepa News

Houston TX (SPX) Dec 23, 2024

While lithium-ion batteries have been the go-to technology for everything from smartphones and laptops to electric cars, there are growing concerns about the future because lithium is relatively scarce, expensive and difficult to source, and may soon be at risk due to geopolitical considerations. Scientists around the world are working to create viable alternatives.

An international team of interdisciplinary researchers, including the Canepa Research Laboratory at the University of Houston, has developed a new type of material for sodium-ion batteries that could make them more efficient and boost their energy performance – paving the way for a more sustainable and affordable energy future.

The new material, sodium vanadium phosphate with the chemical formula NaxV2(PO4)3, improves sodium-ion battery performance by increasing the energy density – the amount of energy stored per kilogram – by more than 15%. With a higher energy density of 458 watt-hours per kilogram (Wh/kg) compared to the 396 Wh/kg in older sodium-ion batteries, this material brings sodium technology closer to competing with lithium-ion batteries.

“Sodium is nearly 50 times cheaper than lithium and can even be harvested from seawater, making it a much more sustainable option for large-scale energy storage,” said Pieremanuele Canepa, Robert Welch assistant professor of electrical and computer engineering at UH and lead researcher of the Canepa Lab. “Sodium-ion batteries could be cheaper and easier to produce, helping reduce reliance on lithium and making battery technology more accessible worldwide.”

From Theory to Reality

The Canepa Lab, which uses theoretical expertise and computational methods to discover new materials and molecules to help advance clean energy technologies, collaborated with the research groups headed by French researchers Christian Masquelier and Laurence Croguennec from the Laboratoire de Rea’ctivite’ et de Chimie des Solides, which is a CNRS laboratory part of the Universite’ de Picardie Jules Verne, in Amiens France, and the Institut de Chimie de la Matie`re Condense’e de Bordeaux, Universite’ de Bordeaux, Bordeaux, France for the experimental work on the project. This allowed theoretical modelling to go through experimental validation.

The researchers created a battery prototype using the new material, NaxV2(PO4)3, demonstrating significant energy storage improvements. NaxV2(PO4)3, part of a group called “Na superionic conductors” or NaSICONs, is designed to let sodium ions move smoothly in and out of the battery during charging and discharging.

Unlike existing materials, it has a unique way of handling sodium, allowing it to work as a single-phase system. This means it remains stable as it releases or takes in sodium ions. This allows the NaSICON to remain stable during charging and discharging while delivering a continuous voltage of 3.7 volts versus sodium metal, higher than the 3.37 volts in existing materials.

While this difference may seem small, it significantly increases the battery’s energy density or how much energy it can store for its weight. The key to its efficiency is vanadium, which can exist in multiple stable states, allowing it to hold and release more energy.

“The continuous voltage change is a key feature,” said Canepa. “It means the battery can perform more efficiently without compromising the electrode stability. That’s a game-changer for sodium-ion technology.”

Possibilities for a Sustainable Future

The implications of this work extend beyond sodium-ion batteries. The synthesis method used to create NaxV2(PO4)3 could be applied to other materials with similar chemistries, opening new possibilities for advanced energy storage technologies. That could in turn, impact everything from more affordable, sustainable batteries to power our devices to help us transition to a cleaner energy economy.

“Our goal is to find clean, sustainable solutions for energy storage,” Canepa said. “This material shows that sodium-ion batteries can meet the high-energy demands of modern technology while being cost-effective and environmentally friendly.”

A paper based on this work was published in the journal Nature Materials. Ziliang Wang, Canepa’s former student and now a postdoctoral fellow at Northwestern University, and Sunkyu Park, a former student of the French researchers and now a staff engineer at Samsung SDI in South Korea, performed much of the work on this project.

Research Report:Obtaining V2(PO4)3 by sodium extraction from single-phase NaxV2(PO4)3 (1 < x < 3) positive electrode materials

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Solar Energy

Pioneering advancements in solid-state battery technology for energy storage

Published

11 hours ago

December 22, 2024

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Pioneering advancements in solid-state battery technology for energy storage

by Riko Seibo

Tokyo, Japan (SPX) Dec 23, 2024

Recent strides in solid-state battery technology are setting the stage for a transformative era in energy storage. These advancements hold promise for revolutionizing electric vehicles and renewable energy systems through improved performance and safety. A focus on electrolyte innovation has been key to this progress, enabling the development of high-performance all-solid-state batteries (ASSBs).

A new review paper provides a comprehensive summary of advancements in inorganic solid electrolytes (ISEs), materials that are central to ASSBs. Researchers examined the roles of oxides, sulfides, hydroborates, antiperovskites, and halides not only as electrolytes but also as catholytes and interface layers, which collectively enhance battery performance and safety.

“We highlighted the recent breakthroughs in synthesizing these materials, honing our attention on the innovative techniques that enable the precise tuning of their properties to meet the demanding requirements of ASSBs,” said Eric Jianfeng Cheng, associate professor at Tohoku University’s Advanced Institute for Materials Research (AIMR). “Precise tuning is crucial for developing batteries with higher energy densities, longer life cycles, and better safety profiles than conventional liquid-based batteries.”

The review also delves into the electrochemical properties of ISEs, including ionic conductivity, stability, and electrode compatibility. Researchers evaluated current ASSB models and suggested emerging strategies that could drive the next generation of energy storage solutions.

However, challenges persist in the development of ASSBs, notably the limited compatibility between ISEs and electrodes, which can trigger interfacial reactions. Addressing these compatibility issues is vital to improving battery efficiency and longevity. The review outlines these challenges and provides insights into efforts aimed at overcoming them.

“Our comprehensive review underscores the importance of continued research and development in the field of solid-state batteries. By developing new materials, improving synthesis methods, and overcoming compatibility issues, current efforts are driving innovation toward practical ASSBs that could transform how we store and use energy,” Cheng added.

Research Report:Inorganic solid electrolytes for all-solid-state lithium/sodium-ion batteries: recent developments and applications

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Solar Energy

Buried interface engineering drives advances in tin-lead perovskite solar cell efficiency

Published

3 days ago

December 20, 2024

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Buried interface engineering drives advances in tin-lead perovskite solar cell efficiency

by Simon Mansfield

Sydney, Australia (SPX) Dec 20, 2024

A team led by Prof. Meng Li from Henan University’s School of Nanoscience and Materials Engineering has unveiled an innovative approach to overcoming stability and efficiency challenges in tin-lead (Sn-Pb) perovskite solar cells. The researchers’ work focuses on optimizing the buried hole-selective interface using a specially designed self-assembled material, offering major implications for single-junction and tandem solar cell technologies.

Tin-lead perovskites are valued for their narrow bandgap properties, which position them as key materials for producing high-efficiency solar cells. However, energy level mismatches and degradation at the buried interface have constrained both their performance and long-term stability. Addressing these issues, Prof. Meng’s team designed a boronic acid-anchored hole-selective contact material, 4-(9H-carbazole-9-yl)phenylboronic acid (4PBA).

Compared to conventional materials, 4PBA demonstrated superior stability and compatibility at the substrate surface. Its high adsorption energy of -5.24 eV and significant molecular dipole moment (4.524 D) improved energy level alignment between the substrate and perovskite layer, facilitating efficient charge extraction. Additionally, the interface engineered using 4PBA improved perovskite crystallization and substrate contact, reducing defects and non-radiative recombination.

These advancements enabled Sn-Pb perovskite solar cells incorporating 4PBA to achieve a power conversion efficiency (PCE) of 23.45%. The material’s reduced corrosiveness also mitigated the degradation effects typically caused by PEDOT:PSS, a widely used hole-transport material, enhancing chemical stability and storage durability. The cells retained 93.5% of their initial efficiency after 2,000 hours of shelf storage.

“This approach offers a practical path to enhancing both the efficiency and stability of Sn-Pb perovskite solar cells, addressing energy level mismatches and interfacial stability concerns,” the research team commented.

The findings provide a foundation for advancing efficient and stable Sn-Pb perovskite solar cells and highlight the importance of interface engineering in next-generation photovoltaic technologies.

Research Report:Buried Hole-Selective Interface Engineering for High-Efficiency Tin-Lead Perovskite Solar Cells with Enhanced Interfacial Chemical Stability