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Synergistic Integration of Soluble Catalysts with Carbon-Free Electrodes for Li–O2 Batteries
ACS Catalysis ( IF 11.3 ) Pub Date : 2017-11-02 00:00:00 , DOI: 10.1021/acscatal.7b02359 Won-Jin Kwak 1 , Sung Hoon Ha 1 , Do Hyung Kim 1 , Kyu Hang Shin 1 , Yang-Kook Sun 1 , Yun Jung Lee 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2017-11-02 00:00:00 , DOI: 10.1021/acscatal.7b02359 Won-Jin Kwak 1 , Sung Hoon Ha 1 , Do Hyung Kim 1 , Kyu Hang Shin 1 , Yang-Kook Sun 1 , Yun Jung Lee 1
Affiliation
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The instabilities associated with solid catalysts and carbon electrode materials are one of the challenges that prevent Li–O2 batteries from achieving a truly rechargeable high energy density. Here, we seek to achieve reversible Li–O2 battery operations with high energies by tackling these instabilities. Specifically, we demonstrate synergistic integration of dual soluble catalysts (2,5-di-tert-butyl-1,4-benzoquinone (DBBQ) for discharging and (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) for charging) with antimony tin oxide (ATO) noncarbon electrodes with a porous inverse opal structure. The dual soluble catalysts showed a synergistic combination without any negative interference with each other, leading to higher capacity and rechargeability. Moreover, noncarbon porous antimony tin oxide (pATO) cathodes guaranteed improved stability against catalyst degradation, while KB carbon electrodes severely threatened stability of the soluble catalysts during cycling. We also found that the surface properties of the electrodes influenced the discharge mechanism, even in the presence of a solution-phase growth promoter such as DBBQ, which implies that further interface engineering may improve the performance. This study shows the great potential of the integration of soluble catalysts with electrode materials for further improvements in capacity, energy efficiency, and rechargeability for the practical development of Li–O2 batteries.
中文翻译：
用于Li–O 2电池的可溶性催化剂与无碳电极的协同集成
与固体催化剂和碳电极材料相关的不稳定性是阻止Li–O 2电池实现真正可充电的高能量密度的挑战之一。在这里，我们试图通过解决这些不稳定性来实现高能量的Li-O 2电池可逆运行。具体而言，我们证明双可溶性催化剂的协同集成（2,5-二-叔-1,4-苯醌醌（DBBQ）用于放电，（2,2,6,6-四甲基哌啶-1-基）氧基（TEMPO用于充电））带有氧化锡锡（ATO）非碳电极和多孔反蛋白石结构体。双重可溶性催化剂显示出协同作用的组合，而彼此之间没有任何负面干扰，从而导致更高的容量和可充电性。此外，非碳多孔氧化锡锑（pATO）阴极可确保提高的抗催化剂降解稳定性，而KB碳电极则严重威胁了循环过程中可溶性催化剂的稳定性。我们还发现，即使在溶液相生长促进剂（例如DBBQ）的存在下，电极的表面性能也会影响放电机理，这意味着进一步的界面工程可以改善性能。2个电池。
更新日期：2017-11-03
中文翻译：
用于Li–O 2电池的可溶性催化剂与无碳电极的协同集成
与固体催化剂和碳电极材料相关的不稳定性是阻止Li–O 2电池实现真正可充电的高能量密度的挑战之一。在这里，我们试图通过解决这些不稳定性来实现高能量的Li-O 2电池可逆运行。具体而言，我们证明双可溶性催化剂的协同集成（2,5-二-叔-1,4-苯醌醌（DBBQ）用于放电，（2,2,6,6-四甲基哌啶-1-基）氧基（TEMPO用于充电））带有氧化锡锡（ATO）非碳电极和多孔反蛋白石结构体。双重可溶性催化剂显示出协同作用的组合，而彼此之间没有任何负面干扰，从而导致更高的容量和可充电性。此外，非碳多孔氧化锡锑（pATO）阴极可确保提高的抗催化剂降解稳定性，而KB碳电极则严重威胁了循环过程中可溶性催化剂的稳定性。我们还发现，即使在溶液相生长促进剂（例如DBBQ）的存在下，电极的表面性能也会影响放电机理，这意味着进一步的界面工程可以改善性能。2个电池。
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