Sinopec

It explores for, produces, transports and sells oil and natural gas, refines and markets fuel products, and makes petrochemicals, coal chemical products and synthetic fibres. It has more than 100 subsidiaries and branches, and its controlling shareholder is the state-owned Sinopec Group. By its own account it is China's largest refiner and supplier of refined oil products, and also first in ethylene capacity.

The 2025 Battery Report notes that in November 2025 LG Chem signed an agreement with Sinopec to develop sodium-ion batteries.