Nitrogen‐Doped Graphene‐Supported Mixed Transition‐Metal Oxide Porous Particles to Confine Polysulfides for Lithium–Sulfur Batteries

• DOI: 10.1002/aenm.201800595
• Publication Date: 2018-05-16T07:57:31Z
• Authors: Qian Sun; Baojuan Xi; Jiang‐Ying Li; Hongzhi Mao; Xiaojian Ma; Jianwen Liang; Jinkui Feng; Shenglin Xiong
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract The intricate charge–discharge reactions and bad conductivity nature of sulfur determine the extreme importance cathode engineering for Li–S batteries. Herein, spinel ZnCo 2 O 4 porous particles@N‐doped reduced graphene oxide (ZnCo @N‐RGO) are prepared via combined procedures refluxing hydrothermal treatment, consisting interconnected uniform nanocubes with an average size 5 nm anchored on nanosheets. as‐obtained composite can act as inimitable scaffold to suppress shuttling polysulfides by chemical confinement N‐RGO first time, demonstrated adsorption energy Li S strong bonding between Zn or Co S. RGO nanosheets a relatively high specific surface area provide good conductive network structural stability. introduction doped N atoms numerous nanoparticles inhibit transfer lithium anode. Due unique compositional features, hybrid materials loading 71% even 82% still deliver capacity, rate capability, enhanced cycling stability exceptionally initial Coulombic efficiency, which displays utilization sulfur.