All articles tagged with #energy density
In a 16-week randomized trial, adults with overweight following an ad libitum low-fat vegan diet ate roughly the same amount of food by weight but consumed about 357 fewer calories per day and reduced dietary energy density by ~30%, leading to weight loss without calorie counting or portion control.
Silicon-carbon batteries mix silicon into the graphite anode to boost energy density and enable faster charging, letting phones run longer per charge and even shrink battery size, as seen in Samsung's Galaxy Z Fold 8/Ultra; however, the silicon content can shorten cycle life, with manufacturers balancing higher capacity against longevity and higher production costs as the technology scales.
A Tsinghua University team reports a solid-state battery using a lithium-rich manganese oxide cathode with a tailored polymer electrolyte, achieving about 604 Wh/kg and 1,027 Wh/L energy density—roughly doubling today's EV cells. The lab results also show over 500 cycles of capacity retention and a nail-penetration safety test, and the work is published in Nature. While this signals a potential path to twice-range or half-weight EV batteries, significant scale-up and manufacturing hurdles remain before it can be used in cars; other players are pursuing similar solid-state approaches, and the relocation from lab to production will take years.
Rumors suggest the Galaxy S27 Ultra will employ silicon-carbon batteries, boosting energy density with potential capacities in the 12,000–18,000 mAh range, enabling longer use between charges. Samsung reportedly targets up to 1,500 charging cycles and improved thermal stability, aided by separator and stacking design tweaks, plus smarter battery management, which could extend device life and push broader adoption of this tech.
The piece uses astrophage, a fictional, ultra-dense energy source from Project Hail Mary, to speculate how far an EV could drive, estimating energy densities and a replacement battery with astrophage cells; it concludes that, in theory, ranges could be enormous, but emphasizes it's a playful thought experiment about fictional tech with safety and military considerations.
Researchers at Tokyo University of Science found that using hard carbon as the anode enables high sodium storage and faster sodiation, potentially matching fast charging of lithium ion batteries and boosting energy density. Sodium ion batteries offer environmental and supply chain advantages, including cheaper production and safer shipping, with growing use in vehicles. However they still lag lithium ion in energy density and face challenges to sustain fast charging due to ion traffic jams, so lithium ion remains dominant for now while sodium ion technology continues to advance.
China’s Changan and GAC are planning 2026 road trials of solid-state batteries in electric cars, with Changan claiming 400 Wh/kg energy density and up to 1,500 km per charge, and GAC aiming to deploy the tech in its Hyptec SUV by year’s end. The move is part of broader work on solid-state chemistries—including sodium-based Naxtra variants—promising higher energy density, safer non-liquid electrolytes, and faster charging (potentially around 12 minutes 0-80%). While solid-state tech eyes quicker adoption, Li-ion batteries are expected to persist during the transition, with researchers reporting even higher densities in some lab-developed chemistries.,
A Science Magazine paper details Molecular Solar Thermal (MOST) energy storage that stores solar energy in UV-triggered molecular states (pyrimidone). It achieves about 1.65 MJ/kg energy density and can be liquid at room temperature, but heat release requires acidic conditions, complicating closed-loop use. The system exhibits self-discharge with a half-life up to roughly 481 days and supports only ~20 charge cycles, which limits practical cycling. While its energy density rivals Li‑ion batteries in theory, efficiency and cycling challenges mean it’s better suited for seasonal heat storage in sunny locations until further refinements improve viability.
UC Santa Barbara chemists report a bio-inspired pyrimidone molecule for molecular solar thermal (MOST) energy storage that captures sunlight, stores it in chemical bonds, and releases it as heat on demand. With an energy density over 1.6 MJ/kg—roughly twice that of lithium-ion batteries—the material can boil water under ambient conditions, enabling practical off-grid heating and solar-collector systems without bulky batteries. The approach functions like a rechargeable solar battery, with energy stored photochemically and released on trigger; the concept is reusable and recyclable and could transform how we store daytime sun for use later.
The iPhone Air features a groundbreaking battery design using patented metal can technology, allowing for a two-dimensional shape that maximizes space and durability. This innovation not only enhances the device's form factor but also paves the way for higher energy density batteries, including the potential adoption of silicon anodes, which could significantly improve battery performance in future electronics.
Scientists at the University of Albany developed a boron-based rocket fuel compound, manganese diboride (MnB2), that offers 150% more energy than aluminum, with a spring-like structure that stores and releases energy efficiently, potentially revolutionizing space propulsion and payload capacity.
The Interior Department has issued a secretarial order restricting permits for solar and wind projects on federal lands unless they match the energy density of traditional power sources like coal, gas, or nuclear, potentially halting many renewable projects and emphasizing a focus on land use efficiency over environmental benefits.
The Galaxy S25 Edge's battery, despite its smaller capacity of 3,900mAh, actually has a higher energy density (758Wh/L) than the Galaxy S25 Ultra's 5,000mAh battery, indicating Samsung's efforts to optimize battery technology within the slim design, possibly using advanced materials like Silicon Carbon, though they opted for conventional Lithium Ion batteries for safety reasons.
Researchers have developed a novel 2D/3D/2D heterostructure that enhances the energy storage capability of ferroelectric capacitors. By controlling the relaxation time of ferroelectric materials using 2D materials, they achieved an energy density up to 19 times higher than commercially available capacitors, with an efficiency over 90%. This innovation paves the way for high-performance electronic devices, particularly in sectors requiring robust power management solutions, such as electric vehicles and infrastructure development.
Panasonic plans to produce a new version of the 2170 cells used in Tesla vehicles at its Nevada plant, aiming to quadruple production capacity by 2030 without building new factories. The improved cells with higher energy density could reduce EV prices. The company also announced plans for a new battery manufacturing plant in the US and an agreement to purchase nano-composite silicon anode material, which could enable 500-mile nonstop trips and 10-minute recharges in EVs. The Biden administration's Inflation Reduction subsidies have been beneficial for Panasonic, with the company forecasting a $587 million increase in operation during the fiscal year ending March 2024.