钠离子电池正从示范项目走向规模放量。机构预计 2026 年国内出货量达到 5-10GWh，2027 年有望提升至 20GWh 左右；电芯成本已降至约 0.4 元/Wh，随规模化效应有望进一步下探至 0.3 元/Wh。储能、电动两轮车、启停电源与低速电动车是率先落地的场景，与锂电形成场景互补而非替代关系。

三大正极路线各有取舍

• 层状氧化物：能量密度优先，工艺与锂电三元体系兼容度高，率先上车。
• 聚阴离子（磷酸焦磷酸铁钠等）：循环寿命与安全性突出，适合储能场景。
• 普鲁士蓝/白类似物：理论成本最低，结晶水控制是产业化最大难点。

负极与辅材：硬碳是关键增量

钠离子半径大于锂离子，石墨负极不再适用，硬碳成为主流选择——前驱体分生物质（椰壳、秸秆）、酚醛树脂与煤基沥青三类，首次库仑效率与压实密度是核心指标。由于钠不与铝形成合金，正负极集流体都可以用铝箔，进一步降本；电解液溶质转向六氟磷酸钠（NaPF6）与 NaFSI 体系。

化工供应链的机会清单

硬碳前驱体（生物质炭化与树脂合成）、钠电电解液及其溶质/溶剂、电池级铝箔、功能粘结剂与气凝胶隔热件等环节，将随出货量放大而持续受益。对涂料与树脂类企业而言，树脂基硬碳前驱体、电池隔热涂层与防火封装材料是顺手可及的延伸方向。

Sodium-ion batteries are moving from pilots to volume. China’s shipments are forecast at 5-10 GWh in 2026 and around 20 GWh in 2027, with cell costs already near RMB 0.4/Wh and heading toward 0.3. Energy storage, two-wheelers, start-stop systems and low-speed EVs land first – complementing rather than replacing lithium-ion.

Three cathode routes, different bets

• Layered oxides: energy-density first, highly compatible with existing ternary production lines – first into vehicles.
• Polyanions (e.g. sodium iron pyrophosphate): cycle life and safety, ideal for storage.
• Prussian blue/white analogues: lowest theoretical cost; controlling crystalline water is the main industrialization hurdle.

Hard carbon is the key anode play

Graphite no longer works for the larger sodium ion: hard carbon dominates, with precursors from biomass (coconut shell, straw), phenolic resins or coal-based pitch; first-cycle Coulombic efficiency and compaction density are the key metrics. Sodium does not alloy with aluminum, so both collectors can be aluminum foil – cutting cost further; electrolyte salts shift to NaPF6 and NaFSI.

Chemical supply chain opportunities

Hard-carbon precursors, sodium electrolyte salts and solvents, battery-grade aluminum foil, functional binders and aerogel insulation all scale with shipments. For coatings and resin producers, resin-based hard-carbon precursors, thermal-barrier coatings and fire-safe cell encapsulation are natural adjacencies.