Nanoarchitectonics of the cathode to improve the reversibility of Li–O₂ batteries

• Hien Thi Thu Pham,
• Jonghyeok Yun,
• So Yeun Kim,
• Sang A Han,
• Jung Ho Kim,
• Jong-Won Lee and
• Min-Sik Park

Beilstein J. Nanotechnol. 2022, 13, 689–698, doi:10.3762/bjnano.13.61

• for lowering the overpotential of the cathode during cycling, even at the high current density of 2,000 mA·g−1. Keywords: cathode composition; electrochemistry; Li–O2 battery; metal–organic framework; nanoarchitectonics; zeolitic imidazolate framework; Introduction Recently, lithium–oxygen batteries

Self-standing heterostructured NiC_x-NiFe-NC/biochar as a highly efficient cathode for lithium–oxygen batteries

• Shengyu Jing,
• Xu Gong,
• Shan Ji,
• Linhui Jia,
• Bruno G. Pollet,
• Sheng Yan and
• Huagen Liang

Beilstein J. Nanotechnol. 2020, 11, 1809–1821, doi:10.3762/bjnano.11.163

• biochar was synthesized for the use in Li–O2 batteries. The electrocatalytic properties of the obtained electrodes were evaluated in a Li–O2 battery and these electrodes showed superior catalytic performance in Li–O2 batteries. Experimental Preparation of NiFe-PBA/PP-T NiFe-PBA/PP precursors were prepared

• that the overpotential of NiFe-PBA/PP-900 in the Li–O2 cell was comparable to data reported in the literature, as shown in Table 1. An ideal Li–O2 cell has a low charge voltage plateau and a high discharge voltage plateau. The gap between charge and discharge voltage plateaus of the Li–O2 battery with

In situ AFM visualization of Li–O₂ battery discharge products during redox cycling in an atmospherically controlled sample cell

• Kumar Virwani,
• Younes Ansari,
• Khanh Nguyen,
• Francisco José Alía Moreno-Ortiz,
• Jangwoo Kim,
• Maxwell J. Giammona,
• Ho-Cheol Kim and
• Young-Hye La

Beilstein J. Nanotechnol. 2019, 10, 930–940, doi:10.3762/bjnano.10.94

• sealed AFM cell permitting in situ scanning probe microscopy observation of electrochemical processes was designed, fabricated, and operated within the controlled atmosphere of a glove box. An example Li/O2 battery system in 1 M LiNO3 in TEGDME was studied at three different water concentrations. The

• electrochemical impedance spectra collected from the AFM cell allowed for the study of cell impedance before and after cycling in the Li/O2 battery. Time-domain correlated images were collected showing changes in surface topography while cell discharge and recharge voltages/capacities were measured. The

From lithium to sodium: cell chemistry of room temperature sodium–air and sodium–sulfur batteries

• Philipp Adelhelm,
• Pascal Hartmann,
• Conrad L. Bender,
• Martin Busche,
• Christine Eufinger and
• Juergen Janek

Beilstein J. Nanotechnol. 2015, 6, 1016–1055, doi:10.3762/bjnano.6.105

• of the C rate cannot be applied to metal–oxygen cells without further assumptions, and therefore, discharge and charge rates are usually given as current density (calculated by using the cell cross section). 2.3 State-of-the art and recent developments 2.3.1 The lithium–oxygen (Li/O2) battery: In

• ]. Interestingly, the components of this Li/O2 battery are remarkably close to those utilized today. The pioneering work on rechargeable, room temperature, Li/O2 batteries with a non-aqueous electrolyte can be summarized as follows. In 1996, Abraham et al. reported on “A polymer electrolyte-based rechargeable

• reactions. Therefore, DEMS or online electrochemical mass spectrometry (OEMS) was introduced into the Li/O2 battery field and is now one of the most important, but seldom employed, diagnostic tools of current research [46][72][73][74][75][76][77]. Figure 5 shows the potential of DEMS analysis when comparing

Electrochemical and electron microscopic characterization of Super-P based cathodes for Li–O₂ batteries

• Mario Marinaro,
• Santhana K. Eswara Moorthy,
• Jörg Bernhard,
• Ludwig Jörissen,
• Margret Wohlfahrt-Mehrens and
• Ute Kaiser

Beilstein J. Nanotechnol. 2013, 4, 665–670, doi:10.3762/bjnano.4.74

• products during the operation of a typical Li–O2 battery. In this context, recently published literature [1][2][3] gives new insights about the mechanism through which the reduction and the oxidation of oxygen occur in aprotic environments. During discharge, the oxygen reduction reaction (ORR) proceeds in

• kV. The images were acquired using a secondary-electron detector with an in-lens configuration. Results and Discussion The first galvanostatic discharge/charge curve of a typical Li–O2 battery that has a carbon-based cathode, a lithium metal anode and LiTFSI/tetraglyme electrolyte is reported in

• the results from electrochemical impedance spectroscopy. In order to comprehend the electrochemical and microstructural changes that occur when the depth of discharge of a Li–O2 battery is further increased, Li–O2 cells were cycled under a fixed capacity regime of 1000 mAh·(g carbon)−1. The