Provenance Record

Solid News piece (819 words) with strong sourcing across both Electrek and Interesting Engineering. Conservative tone, useful context with internal cross-references to prior sodium-ion coverage.

{"https://electrek.co/2026/04/27/catl-sodium-ion-battery-60gwh-energy-storage-deal/":"source-0.html verified for: 60 GWh / 3-year deal, April 27 announcement, HyperStrong as counterparty, 'half of all energy storage batteries CATL delivered in 2025' (verbatim), 'large-scale delivery capabilities' quote, manufacturing challenges around energy density / foaming / moisture control, sodium ~1,000x more abundant than lithium, same form factor as lithium-ion → drop-in compatibility. The article's added clarifier 'foaming during hard-carbon anode manufacturing' is a technically accurate gloss not present in the Electrek quote — the source says only 'foaming, and moisture control during production'. Acceptable as editorial paraphrasing but worth noting.","https://interestingengineering.com/energy/catl-60-gwh-sodium-ion-battery-deal":"source-1.html verified for: November 2025 framework agreement, 200 GWh 2026-2035 commitment, 300+ ampere-hour cells, 160 Wh/kg energy density, 97% system efficiency, >15,000 cycles at 80% capacity retention, -40°C to 70°C operating range. All technical specs match the article."}

All quantitative claims (60 GWh, 200 GWh, 300 Ah, 160 Wh/kg, 97%, 15,000 cycles, -40°C/+70°C, April 27 date) verified verbatim. Direct quotes ('large-scale delivery capabilities', 'overcome the challenges of the entire sodium-ion battery mass production chain') match the snapshots.

APPROVE. Well-sourced original story with both sources directly snapshotted, reachable, and verbatim-supporting every quantitative and quoted claim. Cross-references to prior coverage are appropriate.