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Highly Stable Na3Fe2(PO4)3@Hard Carbon Sodium-Ion Full Cell for Low-Cost Energy Storage
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-13 , DOI: 10.1021/acssuschemeng.9b05098 Yongjie Cao 1, 2 , Yao Liu 2 , Deqiang Zhao 3, 4 , Xiuping Xia 1 , Laichang Zhang 5 , Junxi Zhang 1 , Haishen Yang 1 , Yongyao Xia 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-13 , DOI: 10.1021/acssuschemeng.9b05098 Yongjie Cao 1, 2 , Yao Liu 2 , Deqiang Zhao 3, 4 , Xiuping Xia 1 , Laichang Zhang 5 , Junxi Zhang 1 , Haishen Yang 1 , Yongyao Xia 2
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Abundant flake-porous Na3Fe2(PO4)3 has been prepared via a simple spray drying method. As a cathode material in sodium-ion batteries (SIBs), the galvanostatic charge/discharge test results indicate that the initial reversible discharge specific capacity of the flake-porous Na3Fe2(PO4)3 electrode can reach to 100.8 mAh g–1 (about 93% of the theoretical capacity of 105 mAh g–1) under a current density of 10 mA g–1 (0.1 C) and the high rate capability at 500 mA g–1 (5 C) is up to 60 mAh g–1 after 1100 cycles. The in situ X-ray diffraction pattern and ex situ X-ray photoelectron spectroscopy results indicate that the charge/discharge processes of this cathode material go through a reversible electrochemical reaction of Na3Fe2(PO4)3/Na5Fe2(PO4)3. The outstanding electrochemical performance of Na3Fe2(PO4)3 is attributed to its [Fe2(PO4)3] “lantern unit”-stacked NASICON-type structure and two-dimensional (2D) porous-sheet morphology. The flake-porous Na3Fe2(PO4)3 cathode with a commercial hard carbon anode full cell shows an energy density of 76 Wh kg–1 and the maximum power density of up to 760 W kg–1. The full cell also shows excellent low-temperature performance even at −20 °C (40 mAh g–1 at 100 mA g–1). The outstanding electrochemical and low-temperature performances prove that this full cell is an ideal device for large-scale electrical energy storage (EES).
中文翻译：
高稳定的Na 3 Fe 2（PO 4）3 @硬碳钠离子全电池，用于低成本储能
已经通过简单的喷雾干燥法制备了丰富的片状多孔Na 3 Fe 2（PO 4）3。恒电流充放电测试结果作为钠离子电池（SIB）的正极材料表明，片状Na 3 Fe 2（PO 4）3片状电极的初始可逆放电比容量可达到100.8 mAh g – 1（在105 mA g –1（0.1 C）的电流密度下约为理论容量105 mAh g –1的93％，在500 mA g –1（5 C）时的高倍率容量高达60 mAh g –11100次循环后。原位X射线衍射图谱和原位X射线光电子能谱结果表明，该正极材料的充放电过程经历了Na 3 Fe 2（PO 4）3 / Na 5 Fe 2（ PO 4）3。Na 3 Fe 2（PO 4）3的出色电化学性能归因于其[Fe 2（PO 4）3]“灯笼单元”堆叠的NASICON型结构和二维（2D）多孔板形态。具有商用硬碳阳极充满电池的片状Na 3 Fe 2（PO 4）3阴极具有76 Wh kg –1的能量密度和最大760 W kg –1的最大功率密度。全细胞也显示出优异的低温性能，即使在-20℃下（40毫安克-1在100mA克-1）。出色的电化学和低温性能证明，这种全电池是用于大规模电能存储（EES）的理想设备。
更新日期：2020-01-13
中文翻译：
高稳定的Na 3 Fe 2（PO 4）3 @硬碳钠离子全电池，用于低成本储能
已经通过简单的喷雾干燥法制备了丰富的片状多孔Na 3 Fe 2（PO 4）3。恒电流充放电测试结果作为钠离子电池（SIB）的正极材料表明，片状Na 3 Fe 2（PO 4）3片状电极的初始可逆放电比容量可达到100.8 mAh g – 1（在105 mA g –1（0.1 C）的电流密度下约为理论容量105 mAh g –1的93％，在500 mA g –1（5 C）时的高倍率容量高达60 mAh g –11100次循环后。原位X射线衍射图谱和原位X射线光电子能谱结果表明，该正极材料的充放电过程经历了Na 3 Fe 2（PO 4）3 / Na 5 Fe 2（ PO 4）3。Na 3 Fe 2（PO 4）3的出色电化学性能归因于其[Fe 2（PO 4）3]“灯笼单元”堆叠的NASICON型结构和二维（2D）多孔板形态。具有商用硬碳阳极充满电池的片状Na 3 Fe 2（PO 4）3阴极具有76 Wh kg –1的能量密度和最大760 W kg –1的最大功率密度。全细胞也显示出优异的低温性能，即使在-20℃下（40毫安克-1在100mA克-1）。出色的电化学和低温性能证明，这种全电池是用于大规模电能存储（EES）的理想设备。
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