In this paper we study how to trade off the economic and ecological effects in the remanufacturing closed-loop logistics network design in the context of low-carbon economy. We establish a multi-objective mixed integer linear programming model to find the optimal facility locations and materials flow allocation. In the objective function, we set three minimum targets: economic cost, CO2 emission and waste generation. Through an iterative algorithm, we get the Pareto Frontier of our problem. In the numeric study, we find that in order to achieve a Pareto improvement over an original system, three of the critical rates (i.e. return rate, recovery rate, and cost substitute rate) should be increased. Also, to meet the need of low-carbon dioxide, we plot an iso-CO2 emission curve in which decision makers have a series of optimal choices with the same CO2 emission but different cost and waste generation. Each choice may have different network design but all of these are Pareto optimal solutions, which provide a comprehensive evaluation of both economics and ecology for the decision making.

The development of separator is the key issue in the development of lithium battery and further more in hybrid power automobile and BEV Nowadays, the lithium-ion battery separator industry in China falls short of independent innovations and global competitiveness, and is still at its early stages. In addition, the demand of separators in China still relies on import. The nanofibrous lithium-ion battery separators produced by electrospinning bears the quality of high cycle performance, strong thermal stability, and high discharge rate etc, thus can meet the needs of high-standard batteries. In this study, we introduce the new electrospun fibrous separators, present its manufacturing procedures and products properties, analyze the status of the lithium-ion battery separator industry and put forward possible solutions.

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