A simple and cost-effective method has been developed for the fabrication of microtubular solid oxide fuel cells (MT-SOFCs). Highly asymmetric electrolyte hollow fibers composed of a thin dense skin layer and a thick ...A simple and cost-effective method has been developed for the fabrication of microtubular solid oxide fuel cells (MT-SOFCs). Highly asymmetric electrolyte hollow fibers composed of a thin dense skin layer and a thick porous substrate are first prepared by a modified phase inversion/sintering technique. The porous substrate is then formed into the anode by deposition of a Ni catalyst via an electroless plating method inside the pores while the thin dense skin layer serves directly as the electrolyte film of the fuel cells. A porous cathode layer is produced on the outer surface of the Ni-deposited hollow fibers by slurry coating and subsequent sintering to form a complete micro tubular fuel cell. The process has been employed to fabricate yttrium stabilized zirconia (YSZ) supported Ni-YSZ-YSZ-La0.6Sr0.4Co0.2Fe0.8O3-(LSCF) microtubular fuel cells. The maximum output of the resulting cells is 159.6 mW cm-2 at 800 °C when using H2 as the fuel feed and air as the oxidant.展开更多
An novel method for removal of copper from nickel anodic electrolyte through ion exchange was studied after cupric deoxidization. Orthogonal design experiments show the optimum conditions of deoxidizing cupric into Cu...An novel method for removal of copper from nickel anodic electrolyte through ion exchange was studied after cupric deoxidization. Orthogonal design experiments show the optimum conditions of deoxidizing cupric into Cu+ in the nickel electrolyte are the reductive agent dosage is 4.5 times as the theoretic dosage and reaction time is 0.5 h at 40 ℃ and pH 2.0. Ion exchange experiments show that the breakthrough capacity(Y) decreases with the increase of the linear flow rate(X): Y=1.559-0.194X+ 0.006 7X2. Breakthrough capacity increases with the increase of the ratio of height to radius(RRH). The higher the initial copper concentration, the less the breakthrough capacity(BC). SO42- and nickel concentration have no obvious change during the process of sorption, so it is not necessary to worry about the loss of nickel during the sorption process. Desorption experiments show that copper desorption from the resin is made perfectly with NaCl solution added with 4% (volume fraction) H2O2 (30%) and more than 100 g/L CuCl2 solution is achieved.展开更多
为解决新能源汽车“里程焦虑”和“充电焦虑”问题,能量密度和快充时间成为衡量锂离子电池性能的重要指标,相对应的化学体系也在不断迭代升级。比如正极考虑使用8系或者9系镍钴锰三元正极,提供更高的容量,负极使用掺硅负极,利于极片减薄...为解决新能源汽车“里程焦虑”和“充电焦虑”问题,能量密度和快充时间成为衡量锂离子电池性能的重要指标,相对应的化学体系也在不断迭代升级。比如正极考虑使用8系或者9系镍钴锰三元正极,提供更高的容量,负极使用掺硅负极,利于极片减薄,提升快充性能。通过化学体系选择在满足高比能和超快充的同时,也带来高温和循环衰减问题,主要是由于高镍正极带来的电解液氧化和材料结构变化,以及含硅负极的膨胀特性。本研究通过电解液配方设计,明显改善高镍/硅碳体系锂离子电池的高温和循环性能。其中本研究所输出电解液配方常温循环1 C/1 C 1000T@80%,60℃高温存储30 d容量保持率94%,容量恢复率95%,相比于基准组性能明显提升,为下一代高镍/硅碳体系锂离子电池的应用提供了开发思路。展开更多
基金supported by the National Natural Science Foundation of China (20676073)
文摘A simple and cost-effective method has been developed for the fabrication of microtubular solid oxide fuel cells (MT-SOFCs). Highly asymmetric electrolyte hollow fibers composed of a thin dense skin layer and a thick porous substrate are first prepared by a modified phase inversion/sintering technique. The porous substrate is then formed into the anode by deposition of a Ni catalyst via an electroless plating method inside the pores while the thin dense skin layer serves directly as the electrolyte film of the fuel cells. A porous cathode layer is produced on the outer surface of the Ni-deposited hollow fibers by slurry coating and subsequent sintering to form a complete micro tubular fuel cell. The process has been employed to fabricate yttrium stabilized zirconia (YSZ) supported Ni-YSZ-YSZ-La0.6Sr0.4Co0.2Fe0.8O3-(LSCF) microtubular fuel cells. The maximum output of the resulting cells is 159.6 mW cm-2 at 800 °C when using H2 as the fuel feed and air as the oxidant.
基金Project supported by the Postdoctoral Foundation of Central South University and Minerals Processing and Bioengineering, China
文摘An novel method for removal of copper from nickel anodic electrolyte through ion exchange was studied after cupric deoxidization. Orthogonal design experiments show the optimum conditions of deoxidizing cupric into Cu+ in the nickel electrolyte are the reductive agent dosage is 4.5 times as the theoretic dosage and reaction time is 0.5 h at 40 ℃ and pH 2.0. Ion exchange experiments show that the breakthrough capacity(Y) decreases with the increase of the linear flow rate(X): Y=1.559-0.194X+ 0.006 7X2. Breakthrough capacity increases with the increase of the ratio of height to radius(RRH). The higher the initial copper concentration, the less the breakthrough capacity(BC). SO42- and nickel concentration have no obvious change during the process of sorption, so it is not necessary to worry about the loss of nickel during the sorption process. Desorption experiments show that copper desorption from the resin is made perfectly with NaCl solution added with 4% (volume fraction) H2O2 (30%) and more than 100 g/L CuCl2 solution is achieved.
文摘为解决新能源汽车“里程焦虑”和“充电焦虑”问题,能量密度和快充时间成为衡量锂离子电池性能的重要指标,相对应的化学体系也在不断迭代升级。比如正极考虑使用8系或者9系镍钴锰三元正极,提供更高的容量,负极使用掺硅负极,利于极片减薄,提升快充性能。通过化学体系选择在满足高比能和超快充的同时,也带来高温和循环衰减问题,主要是由于高镍正极带来的电解液氧化和材料结构变化,以及含硅负极的膨胀特性。本研究通过电解液配方设计,明显改善高镍/硅碳体系锂离子电池的高温和循环性能。其中本研究所输出电解液配方常温循环1 C/1 C 1000T@80%,60℃高温存储30 d容量保持率94%,容量恢复率95%,相比于基准组性能明显提升,为下一代高镍/硅碳体系锂离子电池的应用提供了开发思路。
