Haridas Anupriya K, Sadan Milan K, Kim Huihun, Heo Jungwon, Sik Kim Sun, Choi Chang-Ho, Young Jung Hyun, Ahn Hyo-Jun, Ahn Jou-Hyeon
Department of Materials Engineering and Convergence Technology, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828, Republic of Korea.
Department of Chemical Engineering, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828, Republic of Korea.
ChemSusChem. 2021 Apr 22;14(8):1936-1947. doi: 10.1002/cssc.202100247. Epub 2021 Mar 10.
Iron sulfide (FeS) anodes are plagued by severe irreversibility and volume changes that limit cycle performances. Here, a synergistically coupled hybrid composite, nanoengineered iron sulfide/S-doped graphene aerogel, was developed as high-capacity anode material for Li/Na-ion half/full batteries. The rational coupling of in situ generated FeS nanocrystals and the S-doped rGO aerogel matrix boosted the electronic conductivity, Li /Na diffusion kinetics, and accommodated the volume changes in FeS. This anode system exhibited excellent long-term cyclability retaining high reversible capacities of 422 (1100 cycles) and 382 mAh g (1600 cycles), respectively, for Li and Na storage at 5 A g . Full batteries designed with this anode system exhibited 435 (FeS/srGOA||LiCoO ) and 455 mAh g (FeS/srGOA||Na Co Mn O ). The proposed low-cost anode system is competent with the current Li-ion battery technology and extends its utility for Na storage.
硫化铁（FeS）阳极存在严重的不可逆性和体积变化问题，这限制了其循环性能。在此，一种协同耦合的混合复合材料——纳米工程硫化铁/硫掺杂石墨烯气凝胶被开发为用于锂/钠离子半电池/全电池的高容量阳极材料。原位生成的FeS纳米晶体与硫掺杂的rGO气凝胶基质的合理耦合提高了电子导电性、锂/钠扩散动力学，并适应了FeS中的体积变化。这种阳极系统表现出优异的长期循环稳定性，在5 A g的电流密度下，分别对锂和钠存储保持422 mAh g（1100次循环）和382 mAh g（1600次循环）的高可逆容量。采用该阳极系统设计的全电池分别表现出435 mAh g（FeS/srGOA||LiCoO ）和455 mAh g（FeS/srGOA||Na Co Mn O ）的容量。所提出的低成本阳极系统与当前的锂离子电池技术相当，并扩展了其用于钠存储的效用。
