Eren Enis Oğuzhan, Senokos Evgeny, Song Zihan, Yılmaz Elif Begüm, Shekova Irina, Badamdorj Bolortuya, Lauermann Iver, Tarakina Nadezda V, Al-Naji Majd, Antonietti Markus, Giusto Paolo
Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces Potsdam 14476 Germany
PVcomB, Helmholtz-Zentrum Berlin für Materialien und Energie Berlin 12489 Germany.
J Mater Chem A Mater. 2022 Dec 21;11(3):1439-1446. doi: 10.1039/d2ta07391a. eCollection 2023 Jan 17.
Sustainable, high-performance carbonaceous anode materials are highly required to bring sodium-ion batteries to a more competitive level. Here, we exploit our expertise to control the deposition of a nm-sized conformal coating of carbon nitride with tunable thickness to improve the electrochemical performance of anode material derived from sodium lignosulfonate. In this way, we significantly enhanced the electrochemical performances of the electrode, such as the first cycle efficiency, rate-capability, and specific capacity. In particular, with a 10 nm homogeneous carbon nitride coating, the specific capacity is extended by more than 30% with respect to the bare carbon material with an extended plateau capacity, which we attribute to a heterojunction effect at the materials' interface. Eventually, the design of (inter)active electrochemical interfaces will be a key step to improve the performance of carbonaceous anodes with a negligible increase in the material weight.
可持续的高性能碳质阳极材料对于使钠离子电池达到更具竞争力的水平至关重要。在此，我们运用专业知识来控制具有可调厚度的氮化碳纳米级保形涂层的沉积，以改善源自木质素磺酸钠的阳极材料的电化学性能。通过这种方式，我们显著提高了电极的电化学性能，如首次循环效率、倍率性能和比容量。特别是，对于具有10 nm均匀氮化碳涂层的电极，相对于裸碳材料，其比容量提高了30%以上，且平台容量有所扩展，我们将此归因于材料界面处的异质结效应。最终，设计（相互）作用的电化学界面将是在材料重量增加可忽略不计的情况下提高碳质阳极性能的关键一步。
