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—With the development of energy storage technology and sharing economy, the shared energy storage in integrated energy system provides potential benefit to reduce system operation costs and carbon emissions. This paper presents a bi-level carbon-oriented planning method of shared energy storage station for multiple integrated energy systems. Firstly, the energy-carbon relationship of the multiple integrated energy systems is established, and the node carbon intensity models of power grid, integrated energy system and shared energy storage station are established. Secondly, a bi-level planning model of shared energy storage station is developed. The upper layer model solves the optimal capacity planning problem of shared energy storage station to minimize average emission reduction cost in a long time scale. The lower layer model solves the optimal operation problem of multiple integrated energy systems with the goal of minimizing the operation cost in a short time scale. Furthermore, considering the uncertainty of wind and photovoltaic power in integrated energy system, the conditional value at risk method is adopted as the risk measurement index in the lower layer operation cost. Finally, the case study verifies the advantages of the proposed method in economy and environmental friendliness through the comparative analysis of three different energy storage planning cases. Simulation results show that, compared with the energy storage planned separately for each integrated energy system, it is more environmental friendly and economical to provide energy storage services for each integrated energy system through shared energy storage station, the carbon emission reduction rate has increased by 166.53 %, and the system operation cost decreases by 33.48 %. • Node carbon intensity model is established for integrated energy system. • Carbon emission reduction model of integrated energy system is developed. • Carbon-oriented planning model of shared energy storage is established. [ABSTRACT FROM AUTHOR]

• Mn and Mg were recovered from EMR as MgMn 2 O 4 (MMO) through Na 2 CO 3 hydrothermal-roasting process. • Synthesis conditions significantly affect the morphology and structure of MMO. • Flower-like f-MMO and hollow h-MMO were synthesized. • The as-synthesized MMO showed superior electrochemical performances as cathode material of magnesium-ion batteries. Recovering high-value-added Mn products from electrolytic manganese residue (EMR) is prominent due to the scarcity of Mn resource and its increasing importance in various industries. In this study, we explored Mn and Mg recovery from EMR for the synthesis of cathode material MgMn 2 O 4 for the first time through Na 2 CO 3 hydrothermal-roasting method. Na 2 CO 3 concentration and roasting temperature were found to significantly affect the morphology and structure of MgMn 2 O 4. Both flower-like MgMn 2 O 4 (f-MMO) and hollow MgMn 2 O 4 (h-MMO) were synthesized under optimized conditions. Additionally, the electrochemical performances of MgMn 2 O 4 as cathode material of magnesium-ion batteries were evaluated. Both f-MMO and h-MMO showed superior rate performance. High initial reversible capacity can be achieved (237.5 mAh/g), and still retain 157.7 mAh/g after 40 cycles at 100 mA/g and 76 mAh/g after 500 cycles at 500 mA/g. This work inspires the way for recovering Mn from EMR as energy storage material. [ABSTRACT FROM AUTHOR]