A Two‐Dimensional Metal–Organic Polymer Enabled by Robust Nickel–Nitrogen and Hydrogen Bonds for Exceptional Sodium‐Ion Storage

Wang, Liubin; Ni, Youxuan; Hou, Xuesen; Chen, Li; Li, Fujun; Chen, Jun

doi:10.1002/anie.202008726

Cited by 123 publications

(115 citation statements)

References 38 publications

(49 reference statements)

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“…A noticeable N1s peak located at 402.2 eV and another obvious C 1s peak at 285.9 eV were observed in the pristine film before and after etching, which could be attributed to the CN bond, indicating that there is still some organic DMA + residues [DMA = (CH 3 ) 2 NH 2 + ] both in the surface and bulk of films. [48][49][50] Surprisingly, after this HOCP treatment, both the N1s and C1s peaks resulted from the CN bond disappeared, suggesting that the undesirable organic DMA + residue was eliminated. The C 1s peak located at 284.8 eV assigned to CC bond was observed, which may be due to the inevitable carbon adsorption and unintentional contamination during the sample transfer and testing.…”

Section: In-situ Hot Oxygen Cleansing and Trap Passivationmentioning

confidence: 99%

In‐Situ Hot Oxygen Cleansing and Passivation for All‐Inorganic Perovskite Solar Cells Deposited in Ambient to Breakthrough 19% Efficiency

Wang

Gao

et al. 2021

Adv Funct Materials

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All-inorganic perovskite CsPbI 3 has attracted extensive attention recently because of its excellent thermal and chemical stability. However, its photovoltaic performance is hindered by large energy losses (E loss ) due to the presence of point defects. In addition, hydroiodic acid (HI) is currently employed as a hydrolysis-derived precursor of intermediate compounds, which often leads to a small amount of organic residue, thus undermining its chemical stability. Herein, an in-situ hot oxygen cleansing with superior passivation (HOCP) for the triple halide-mixed CsPb(I 2.85 Br 0.149 Cl 0.001 ) perovskite solar cells (abbreviated as CsPbTh 3 ) deposited in an ambient atmosphere to reduce the E loss to as low as 0.48 eV for the power conversion efficiency (PCE) to reach 19.65% is demonstrated. It is found that the hot oxygen treatment effectively removes the organic residues. Meanwhile, it passivates halide vacancies, hence reduces the trap states and nonradiative recombination losses within the perovskite layer. As a result, the PCE is increased significantly from 17.15% to 19.65% under 1 sun illumination with an open-circuit voltage enlarged to 1.23 from 1.14 V, which corresponds to an E loss reduction from 0.57 to 0.48 eV. Also, the HOCP-treated devices exhibit better long-term stability. This insight should pave a way for decreasing nonradiative charge recombination losses for high-performance inorganic perovskite photoelectronics.

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Section: In-situ Hot Oxygen Cleansing and Trap Passivationmentioning

confidence: 99%

In‐Situ Hot Oxygen Cleansing and Passivation for All‐Inorganic Perovskite Solar Cells Deposited in Ambient to Breakthrough 19% Efficiency

Wang

Gao

et al. 2021

Adv Funct Materials

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“…The FTIR spectrum of Co-TABQ (Figure 3 a) also presents a characteristic N-H stretching vibration while the peak of C = O bond (1615 cm À1 ) blue shifts as compared with that of TABQ, which is attributed to the coordination effect forming an extended conjugated system. [23] The electrocatalytic ORR activities of TM-BTA were estimated in 0.1 M KOH solution using a rotating ring-disk electrode (RRDE). In cyclic voltammograms (Figure S30), the distinguishable cathodic peak at O 2 atmosphere indicates the catalytic capability of TM-BTA + carbon black mixture (TM-BTA/C).…”

Section: Angewandte Chemiementioning

confidence: 99%

Regulating Electrocatalytic Oxygen Reduction Activity of a Metal Coordination Polymer via d–π Conjugation

Liu

Shang

et al. 2021

Angewandte Chemie

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Non-noble transition metal complexes have attracted growing interest as efficient electrocatalysts for oxygen reduction reaction (ORR) while their activities still lack rational and effective regulation. Herein, we propose a d-p conjugation strategy for rough and fine tuning of ORR activity of TM-BTA (TM = Mn/Fe/Co/Ni/Cu, BTA = 1,2,4,5-benzenetetramine) coordination polymers. By first-principle calculations, we elucidate that the strong d-p conjugation elevates the d xz /d yz orbitals of TM centers to enhance intermediate adsorption and strengthens the electronic modulation effect from substitute groups on ligands. Based on this strategy, Co-TABQ (tetramino benzoquinone) is found to approach the top of ORR activity volcano. The synthesized Co-TABQ with atomically distributed Co on carbon nanotubes exhibits a half-wave potential of 0.85 V and a specific current of 127 mA mg metal À1 at 0.8 V, outperforming the benchmark Pt/C. The high activity, low peroxide yield, and considerable durability of Co-BTA and Co-TABQ promise their application in oxygen electrocatalysis. This study provides mechanistic insight into the rational design of transition metal complex catalysts.

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“…Very recently, Li's group synthesized a metal-organic polymer, Ni-TABQ (TABQ, tetraminobenzoquinone) via d-π hybridization (Figure 3e). [40] With two conjugated redox centers of benzoid carbonyls and imines as active sites for sodium storage, Ni-TABQ demonstrated an outstanding performance with very high capacities of 469.5 mAh g −1 at 100 mA g −1 and 345.4 mAh g −1 at 8 A g −1 and good cycle stability of 330.2 mAh g −1 after 450 cycles. [40] Structure and morphology of MOFs are highly dependent on the geometry of conjugated ligands and coordination symmetry of metal nodes, including porous structure, crystalline structure, and topologies.…”

mentioning

confidence: 99%

“…[40] With two conjugated redox centers of benzoid carbonyls and imines as active sites for sodium storage, Ni-TABQ demonstrated an outstanding performance with very high capacities of 469.5 mAh g −1 at 100 mA g −1 and 345.4 mAh g −1 at 8 A g −1 and good cycle stability of 330.2 mAh g −1 after 450 cycles. [40] Structure and morphology of MOFs are highly dependent on the geometry of conjugated ligands and coordination symmetry of metal nodes, including porous structure, crystalline structure, and topologies. [41] Besides, since MOFs are one kind of well-known crystalline materials, the crystal growth is highly sensitive to the environment, such as temperature, solvent, PH value, and concentration, and thus, particle size, morphology, and crystallinity could be easily engineered.…”

mentioning

confidence: 99%

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Metal–Organic Frameworks and Their Derivatives: Designing Principles and Advances toward Advanced Cathode Materials for Alkali Metal Ion Batteries

Wang

et al. 2021

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storage and conversion. [8a,c,11] For example, Xu et al. summarized the advances of MOFs and their derivatives for electrochemical applications, including supercapacitors, batteries, and fuel cells. [11a] Besides, Zou et al. presented some engineering strategies to improve the performance of MOF-related materials for energy storage and conversion. [11i] However, few review articles focus on MOF-related materials as cathode materials for alkali metal ion batteries (LIBs, SIBs, and PIBs). Besides, the relationship between fundamental characteristics and electrochemical performance for MOF-related cathode materials is less discussed. Given the key role of the cathode materials in the batteries, in this review, we present design principles for promoting the electrochemical performance of MOF-related materials in terms of component/structure design, composite fabrication, and morphology engineering. Last, the challenges and perspectives about MOF-related cathode materials for alkali metal ion batteries are discussed.

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A Two‐Dimensional Metal–Organic Polymer Enabled by Robust Nickel–Nitrogen and Hydrogen Bonds for Exceptional Sodium‐Ion Storage

Cited by 123 publications

References 38 publications

In‐Situ Hot Oxygen Cleansing and Passivation for All‐Inorganic Perovskite Solar Cells Deposited in Ambient to Breakthrough 19% Efficiency

In‐Situ Hot Oxygen Cleansing and Passivation for All‐Inorganic Perovskite Solar Cells Deposited in Ambient to Breakthrough 19% Efficiency

Regulating Electrocatalytic Oxygen Reduction Activity of a Metal Coordination Polymer via d–π Conjugation

Metal–Organic Frameworks and Their Derivatives: Designing Principles and Advances toward Advanced Cathode Materials for Alkali Metal Ion Batteries

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