Abstract : We report simple yet rationally designed, polydopamine-wrapped, silicon nanoparticle-impregnated macroporous CNT particles for high-capacity lithium-ion batteries. Abstract : We present a simple but rationally designed anode composed of polydopamine-wrapped, Si nanoparticle-impregnated macroporous CNT particles for lithium-ion batteries; this anode is mass-producible and at the same time achieves an excellent capacity and its retention by effective stress relaxation and surface passivation.