The emerging demands in large energy-density storage for portable electronic devices and transportations such as electric vehicles are attracting plenty of interest in developing next-generation batteries. More specifically, scientists are putting tremendous attempts in engineering a series of new electrode materials, e.g., silicon as anode and sulfur as cathode, to replace the conventional graphite/transition-metal based lithium ion batteries (Bruce, Nat Mater 2012), thus to achieve a 3-5 times higher capacity to meet a strategic perspective energy-density of 500 Wh/kg made by China, US, and Europe. Sulfur has been identified as one of most promising cathode materials for its high theoretical capacity (1675 mAh/g, 10x times higher than LiCoO2) and the theoretical specific energy (~2600 Wh/kg, 5x times higher than LiCoO2/graphite) in Li-S battery. Nevertheless, researchers remain stagnant in pushing this high-density battery into industrial applications. Averting chemomechanical degradation poses as one of the primary challenges in exploiting sulfur cathodes. Extensive work has been done on confinements of sulfur/polysulfides using various carbon nanostructures to kinetically ‘slow down’ the ‘shuttling effect’ (Ji, Nat Mater 2009. Seh, Nat Commun 2013). Most of these efforts are focused on the physical confinements by constructing versatile matrix/network configurations which can thermodynamically ‘slow down’ (‘temporally’) the sulfur flowing process. In order to avoid the thermodynamic loss, a stronger chemical bonding is required. In this presentation, we will introduce a novel double-net matrix, which is composed of industry available activated carbon (AC) covered by a mesoporous silicon oxide cap. The oxide cap not only ‘traps’ (physically) the sulfide molecular, but also chemically bonds the molecular that substantially delays the diffusion of sulfur/sulfides, resulting in high capacity retention and rate performance. The capacity as high as ~780 mAh/g at 0.2 C, ~500 mAh/g at 0.5 C, and ~400 mAh/g at 2.0 C along with a Coulombic efficiency of ~100.0% of the battery using the double-net enclosed sulfur composite as cathode was retained after 1000 cycles, respectively. In parallel, a wide range of sulfur ratio up to ~73% in the composite leads to a high loading of active material (up to 6.5 mg/cm2), thus enabling a high energy density. The improved cycling and rate capability as well as the high energy density of the current Li-S battery using industry available both AC and sulfur make a really practical way in mass production as a high-energy-storage system.