energy density
Americannoun
Etymology
Origin of energy density
First recorded in 1955–60
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"However, today's commercial sodium-ion cells generally have lower energy density than the best lithium-ion cells, and the technology is less mature overall," said Schütte.
From Science Daily ● Jun. 21, 2026
New battery tech must compete on lifespan, durability, energy density, safety and cost—which is dependent on massive scale.
From The Wall Street Journal ● Jun. 19, 2026
The 1.65 megajoules per kilogram recorded in their February paper is significantly greater than the energy density of lithium-ion batteries, currently the most popular type of battery for phones and electric cars.
From BBC ● May 7, 2026
Actual charging times and energy density depend on vehicle specifications and real-world conditions.
From The Wall Street Journal ● Mar. 28, 2026
So what one needs, in order to warp space-time in a way that will allow travel into the past, is matter with negative energy density.
From "A Brief History of Time: And Other Essays" by Stephen Hawking
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
