| 2 | 高性能的新款MIRAI燃料电池堆的研究进展显示文摘2014年,丰田汽车公司推出了全球首款商用燃料电池汽车(FCV)MIRAI[1]。与第1代MIRAI车型使用的燃料电池(FC)电堆相比,新款MIRAI车型使用的燃料电池堆采用了新的双极板流道和改进的电极,成为世界上体积功率密度最高的产品之一,其功率密度为5.4kW/L(不包括端板),性能比第1代MIRAI车型的燃料电池堆提高了1.5倍[2]。提高电流密度是提高动力系统功率性能、减小体积的重要手段,双极板的作用是在电池内部合理地分配气体和排水,以稳定电流的产生。传统的直流通路容易被水淹没,很难维持稳定的电流。为了提高氧气的扩散效率,设计了1个局部窄流道,而不需要在原燃料电池堆中采用三维网格流场。这项新技术可使催化剂层中的氧浓度比传统的直流通道高2.3倍。除双极板外,催化剂载体和离聚物也得到了改进。铂(Pt)表面的离聚物会引起磺酸中毒,导致催化活性下降。为了解决这一难题,开发了介孔碳作为催化剂载体,在介孔碳的孔中携带Pt,通过减少离聚物与Pt表面的接触来抑制磺酸中毒。采用了1种高透氧离聚物,其透氧性能是先前燃料电池堆使用的离聚物的3倍。 | T.YOSHIZUMI H.KUBO M.OKUMURA 吴玲(译) | 2021 | 汽车与新动力2021，4，6： | 0 |
| 3 | Study of Particle Behavior for Steady-State Operation in JT-60U显示文摘This paper summarizes recent studies of particle balance in long pulse discharges,long-term erosion/deposition and hydrogen retention for carbon divertor tiles,and particle behav-ior in SOL and divertor plasmas related to the two foregoing topics in JT-60U.Global saturationof the particle inventory appeared in the later phase of an ELMy H-mode plasma after severallong pulse discharges.As for carbon divertor tiles,erosion was dominant in the outer divertor,and deposition was dominant in the inner divertor.Hydrogen isotope concentration(H+D)/Cin the deposition layer was estimated to be~0.032.The SOL plasma flow towards the innerdivertor was observed at the low-field-side midplane,and influence of the E_r×B drift flow fromthe outer divertor to the inner divertor via the private region on the divertor particle flux wasevaluated to be large in the attached divertor plasmas.The preferential deposition in the innerdivertor can be a consequence of these flows.For direct observation of the hydrogen molecularbehavior in the divertor plasmas,hydrogen molecular line emission was measured and the fall inthe emission intensity with distance from the divertor plates was reproduced by calculation witha neutral transport code and a collisional radiative modeling code. | H.KUBO | 2006 | Plasma Science and Technology2006，8，1： | 0 |
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