Rom-temperature sodium-sulfur battery has attracted more and more widespread attention on account of the low cost, high capacity and reliable efficiency. Nevertheless, how to further improve sulfur reactivity and high-rate cycling performance remains challenging. Herein, carbon-wrapped nanocobalt anchored on graphene aerogel is fabricated to resolve low sulfur reactivity, conductivity and the large volumetric expansion during the charge/discharge process. The novel sulfur composite cathode shows up an initial discharge capacity of 572.8 mAh g^-1 at 5 C with an extremely low average capacity fading of 0.01% per cycle from 200 to 1000 cycles. Significantly, the cathode is also used for assembling solid-state Na/S batteries, with an initial discharge capacity of 484.9 mAh g^-1 at 0.5 C and a retainion capacity of 226 mAh g^-1 after 1000 cycles. This outstanding performance is ascribed to the electrocatalytic effects of the nanocobalt and the conductive and flexible graphene aerogel, which can effectively enhance chemical reaction kinetics and accommodate the fast volume change.

室温钠硫电池由于其低成本，高容量和可靠的可靠性而受到越来越广泛的关注。然而，如何进一步改善硫反应性和高速率循环性能仍然是挑战。本文中，制造了锚固在石墨烯气凝胶上的碳包裹纳米钴，以解决充电/放电过程中低硫反应性，电导率和大体积膨胀的问题。新型硫复合阴极在5 C时的初始放电容量为572.8 mAh g ^-1，在200至1000次循环中，每循环0.01％的极低平均容量衰减。重要的是，该阴极还用于组装固态Na / S电池，其初始放电容量为484.9 mAh g ^-11000次循环后，在0.5 C下的保留容量为226 mAh g ^-1。这种出色的性能归因于纳米钴以及导电和柔性石墨烯气凝胶的电催化作用，可有效增强化学反应动力学并适应快速的体积变化。