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Batteries and energy storage

Battery materials, grid storage, EV batteries, recycling, and energy-storage technologies.

5,928 stories · 41 in 30 days · Updated Sep 28, 2026

The pace of conversation

Posts per month

2020-01: 64 posts2020-02: 83 posts2020-03: 57 posts2020-04: 48 posts2020-05: 60 posts2020-06: 56 posts2020-07: 62 posts2020-08: 78 posts2020-09: 65 posts2020-10: 60 posts2020-11: 59 posts2020-12: 81 posts2021-01: 78 posts2021-02: 52 posts2021-03: 74 posts2021-04: 57 posts2021-05: 59 posts2021-06: 72 posts2021-07: 71 posts2021-08: 70 posts2021-09: 74 posts2021-10: 79 posts2021-11: 70 posts2021-12: 71 posts2022-01: 86 posts2022-02: 64 posts2022-03: 64 posts2022-04: 80 posts2022-05: 86 posts2022-06: 72 posts2022-07: 100 posts2022-08: 76 posts2022-09: 78 posts2022-10: 86 posts2022-11: 73 posts2022-12: 88 posts2023-01: 92 posts2023-02: 79 posts2023-03: 65 posts2023-04: 97 posts2023-05: 68 posts2023-06: 76 posts2023-07: 102 posts2023-08: 97 posts2023-09: 112 posts2023-10: 98 posts2023-11: 86 posts2023-12: 86 posts2024-01: 132 posts2024-02: 69 posts2024-03: 81 posts2024-04: 90 posts2024-05: 99 posts2024-06: 102 posts2024-07: 70 posts2024-08: 74 posts2024-09: 84 posts2024-10: 68 posts2024-11: 70 posts2024-12: 81 posts2025-01: 57 posts2025-02: 61 posts2025-03: 78 posts2025-04: 67 posts2025-05: 61 posts2025-06: 56 posts2025-07: 60 posts2025-08: 65 posts2025-09: 65 posts2025-10: 86 posts2025-11: 54 posts2025-12: 55 posts2026-01: 87 posts2026-02: 70 posts2026-03: 62 posts2026-04: 57 posts2026-05: 49 posts2026-06: 63 posts2026-07: 64 posts2026-08: 45 posts2026-09: 35 posts
2020-012026-09

Posts per month · first and latest months may be partial.

01 / EXPLORE THROUGH TIME

Timeline

Start with the latest. Scroll back through time, or zoom in for more.

Year by yearUp to 5 stories per year
2026532 stories
Japan develops a method to recover up to 90% of lithium from used EV batteries↗ tech.supercarblondie.com · HN · 195 comments · 750 points · Jul 14, 2026
Electric motors with no rare earths↗ renaultgroup.com · HN · 218 comments · 717 points · Jun 12, 2026
New stainless steel can survive conditions for hydrogen production in seawater↗ sciencedaily.com · HN · 147 comments · 315 points · May 11, 2026
Solar and batteries can power the world↗ nworbmot.org · HN · 460 comments · 292 points · Apr 03, 2026
Donut Lab’s all-solid-state battery delivers 400 Wh/kg of energy density↗ donutlab.com · HN · 268 comments · 276 points · Jan 05, 2026
2025765 stories
How big a solar battery do I need to store all my home's electricity?↗ shkspr.mobi · HN · 473 comments · 395 points · Sep 15, 2025
A new class of materials that can passively harvest water from air↗ blog.seas.upenn.edu · HN · 205 comments · 401 points · May 26, 2025
Building my own solar power system↗ medium.com · HN · 344 comments · 443 points · May 18, 2025
I tried making artificial sunlight at home↗ victorpoughon.fr · HN · 233 comments · 622 points · Mar 27, 2025
Solarpunk↗ en.wikipedia.org · HN · 269 comments · 432 points · Mar 02, 2025
20241,020 stories
The magic of DC-DC voltage conversion (2023)↗ lcamtuf.substack.com · HN · 154 comments · 392 points · Sep 11, 2024
How to debug your battery design↗ github.com · HN · 113 comments · 352 points · Jul 28, 2024
First anode-free sodium solid-state battery↗ pme.uchicago.edu · HN · 129 comments · 352 points · Jul 06, 2024
Lithium-free sodium batteries exit the lab and enter US production↗ newatlas.com · HN · 386 comments · 489 points · May 03, 2024
Thailand discovers nearly 15M tonnes of lithium↗ malaymail.com · HN · 291 comments · 477 points · Jan 19, 2024
20231,058 stories
Solar Cell Efficiency Table↗ onlinelibrary.wiley.com · HN · 18 comments · 67 points · Dec 30, 2023
How to Build a Small Solar Power System↗ solar.lowtechmagazine.com · HN · 17 comments · 67 points · Dec 27, 2023
Researchers are scaling up solar-powered kelp farms↗ spectrum.ieee.org · HN · 28 comments · 67 points · Dec 25, 2023
Can flow batteries finally beat lithium?↗ spectrum.ieee.org · HN · 101 comments · 80 points · Dec 24, 2023
DIY ventilation heat exchanger (2010)↗ ecorenovator.org · HN · 99 comments · 142 points · Dec 23, 2023
2022953 stories
CT scans of batteries↗ scanofthemonth.com · HN · 70 comments · 513 points · Oct 20, 2022
Everything with a battery should have an off switch↗ twitter.com · HN · 597 comments · 821 points · May 06, 2022
A new heat engine with no moving parts is as efficient as a steam turbine↗ news.mit.edu · HN · 262 comments · 616 points · Apr 13, 2022
Google open sources solar atmospheric water generator↗ github.com · HN · 234 comments · 486 points · Mar 17, 2022
EU to make it mandatory to use customer-replaceable batteries in household items↗ eevblog.com · HN · 637 comments · 1099 points · Mar 13, 2022
2021827 stories
Study: Recycled Lithium Batteries as Good as Newly Mined↗ spectrum.ieee.org · HN · 187 comments · 635 points · Oct 19, 2021
Simple, solar-powered water desalination (2020)↗ news.mit.edu · HN · 227 comments · 591 points · Jul 02, 2021
The price of lithium-ion batteries has declined by 97% in the last three decades↗ ourworldindata.org · HN · 318 comments · 477 points · Jun 07, 2021
Scientists develop ‘cheap and easy’ method to extract lithium from seawater↗ mining.com · HN · 290 comments · 496 points · Jun 06, 2021
Lithium battery costs have fallen by 98% in three decades↗ economist.com · HN · 412 comments · 643 points · Apr 03, 2021
2020773 stories
Photocatalyst splits water into H and O2 at quantum efficiency near 100%↗ fuelcellsworks.com · HN · 284 comments · 570 points · Dec 26, 2020
Tesla’s former CTO is building a giant lithium-ion battery recycling operation↗ wsj.com · HN · 272 comments · 421 points · Aug 29, 2020
After 50 years of effort, researchers made silicon emit light↗ wired.com · HN · 97 comments · 319 points · Apr 11, 2020
Teardown of a $1.25 LED Lightbulb↗ electronupdate.blogspot.com · HN · 287 comments · 324 points · Feb 19, 2020
Simple, solar-powered water desalination↗ news.mit.edu · HN · 192 comments · 501 points · Feb 07, 2020
Scroll through time ↕

02 / CATCH UP

The conversation now

Popular stories, with attention fading over roughly two weeks.

Replacing the old battery on rechargeable bike lights↗ jvns.ca · HN · 120 comments · 202 points · Sep 27, 2026
Regeneration of used batteries via electrode–electrolyte interphase dissolution↗ pubs.rsc.org · HN · 23 comments · 96 points · Sep 18, 2026
Electric rain can eat through metal↗ scientificamerican.com · HN · 27 comments · 117 points · Aug 27, 2026
Why are there no flow batteries with symmetric ferrocyanide electrolytes?↗ chemisting.com · HN · 38 comments · 55 points · Sep 02, 2026
Open Battery Information↗ github.com · HN · 14 comments · 57 points · Aug 29, 2026

03 / GO DEEPER

Follow your curiosity

Find a particular story, revisit a year, or see what resonated.

Highest rated · the last 30 days

Replacing the old battery on rechargeable bike lights↗ jvns.ca · HN · 120 comments · 202 points · Sep 27, 2026
Regeneration of used batteries via electrode–electrolyte interphase dissolution↗ pubs.rsc.org · HN · 23 comments · 96 points · Sep 18, 2026
Open Battery Information↗ github.com · HN · 14 comments · 57 points · Aug 29, 2026
Why are there no flow batteries with symmetric ferrocyanide electrolytes?↗ chemisting.com · HN · 38 comments · 55 points · Sep 02, 2026
Piezoelectric effect in polycrystalline diamond membranes↗ science.org · HN · 1 comments · 10 points · Sep 13, 2026
Motorless solid-state cooler uses heat to cool itself↗ tomshardware.com · HN · 0 comments · 10 points · Sep 01, 2026
Steve Jobs 8th Grade Science Fair Project: The Silicon-Controlled Rectifier↗ rrauction.com · HN · 0 comments · 7 points · Aug 29, 2026
Stock Buybacks and Quarterly Thinking: How America Fell Behind in Battery Tech↗ ineteconomics.org · HN · 0 comments · 5 points · Sep 26, 2026
World's first battery-powered self-unloading bulk carrier starts in Australia↗ bunkerindex.com · HN · 0 comments · 5 points · Aug 30, 2026
Underwater solar cells can operate 10 meters below the ocean's surface↗ techxplore.com · HN · 0 comments · 4 points · Sep 12, 2026

10 stories shown.

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