Why lithium-ion batteries lose capacity and struggle to charge in the cold, how much you lose by temperature, and the materials-level fixes - low-temperature electrolytes and cell design.

What drives battery energy density, realistic Wh/kg by chemistry, and the three levers - cathode, anode, cell design - that raise it. A materials-first guide for engineers.

A buyer's guide to battery electrolyte: what it does, liquid vs gel vs solid, the salt/solvent/additive spec that matters, how to choose for your cell, and how to source custom electrolyte.

What LMFP (lithium manganese iron phosphate) batteries are, how they add 15-20% energy over LFP without leaving the phosphate family, LMFP vs LFP vs NMC, and who is shipping them in 2026.

What anode-free (anode-less) batteries are, why they reach the highest energy density of any lithium cell, the cycle-life problem, and who is developing them in 2026.

What semi-solid-state (quasi-solid) batteries are, why they are the pragmatic bridge to solid-state, who is shipping them in 2026, and how they compare.

The solid-state battery companies leading the race in 2026 - Toyota, QuantumScape, Solid Power, Samsung SDI, ProLogium, Factorial and more - by approach, status, and which are public.

Are graphene batteries real? What graphene actually does in a battery, the hype vs the reality, where it genuinely helps, and how to read graphene battery marketing.

Sodium-ion vs lithium-ion compared on energy density, cost, abundance, safety, cold-weather performance and cycle life - and which to choose in 2026.