Enhanced Electrochemical Properties of Polyaniline-Coated LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Song, Liubin; Tang, Fuli; Xiao, Zhongliang; Cao, Zhong; Zhu, Huali; Li, Anxian

doi:10.1007/s11664-018-6453-9

Cited by 38 publications

(26 citation statements)

References 32 publications

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“…Furthermore, Fourier‐transform (FT)IR spectra were obtained in the range of 700–4000 cm −1 to provide evidence of PDA modification for PNCM in Figure S1 (in the Supporting Information). For PNCM, the OH characteristic band at 3366 cm −1 , C=C stretching vibration at 1584 cm −1 , and C−O group signal at 1110 cm −1 , which are attributed to the PDA layer, were observed . In the case of TiO 2 ‐PNCM, the Ti 2p (455–475 eV) peak and minor peaks of Ti 3s and Ti 3p in the TiO 2 coating layer are newly exhibited, although the peaks for the transition metals are lower than that of the bare NCM because of a uniform TiO 2 layer coated on the particle surface.…”

Section: Resultsmentioning

confidence: 96%

Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

et al. 2019

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Ni‐rich layered oxides are promising cathode materials for developing high‐energy lithium‐ion batteries. To overcome the major challenge of surface degradation, a TiO2 surface coating based on polydopamine (PDA) modification was investigated in this study. The PDA precoating layer had abundant OH catechol groups, which attracted Ti(OEt)4 molecules in ethanol solvent and contributed towards obtaining a uniform TiO2 nanolayer after calcination. Owing to the uniform coating of the TiO2 nanolayer, TiO2‐coated PDA‐LiNi0.6Co0.2Mn0.2O2 (TiO2‐PNCM) displayed an excellent electrochemical stability during cycling under high voltage (3.0–4.5 V vs. Li+/Li), during which the cathode material undergoes a highly oxidative charge process. In addition, TiO2‐PNCM exhibited excellent cyclability at elevated temperature (60 °C) compared with the bare NCM. The surface degradation of the Ni‐rich cathode material, which is accelerated under harsh cycling conditions, was effectively suppressed after the formation of an ultra‐thin TiO2 coating layer.

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Section: Resultsmentioning

confidence: 96%

Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

et al. 2019

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“…Figure 8a,b shows the CV curves of the first three cycles for both materials at as can rate of 0.2 mV s À1 .T he redox peak potentials and potential differences of the first three cycles are listed in Ta ble 2 and the potential gap of the redoxp eak after modification is more narrow than that of the pristine NCM811, indicatingt hat the electrode polarization decreases. [38] Moreover,t he Li + diffusion coefficient (D Li + )i nt he positive electrode material can be calculated by the Randles-Sevcik equation [Eq. (1)]: [39] i p ¼ 0:…”

Section: Resultsmentioning

confidence: 99%

In Situ Surface Modification for Improving the Electrochemical Performance of Ni‐Rich Cathode Materials by Using ZrP₂O₇

Zhang

et al. 2019

ChemSusChem

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Ni‐rich layered LiNi0.8Mn0.1Co0.1O2 (NCM811) cathode material has promising prospects for high capacity batteries at acceptable cost. However, LiNi0.8Mn0.1Co0.1O2 cathode material suffers from surface structure instability and capacity degradation upon cycling. In this study, in situ ZrP2O7 coating is introduced to provide a protective structure. The optimum modification amount is 1.0 wt %. A series of characterization methods (X‐ray diffraction, high‐resolution transmission electron microscopy, and X‐ray photoelectron spectroscopy) verify the generation and structure of the coating layer. Electrochemical performance tests demonstrate that the cycle retention rate increases from 66.35 to 86.92 % after 100 cycles at 1 C rate. The dense inorganic pyrophosphate layer not only has chemical stability against the electrolyte but also eliminates surface residual lithium. The protective layer and the matrix are strongly joined by high‐temperature heating, thereby giving a certain mechanical strength and protecting the overall structure of the topography. Therefore, the cycle and rate performance are enhanced by the modification with ZrP2O7.

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“…Likewise, coating PANI onto monometallic and bimetallic Li-containing oxides to form modified cathode materials can overcome these obstacles. Song et al[96] obtained PANI modified PANI-coated Li(Ni 0.8 Co 0.1 Mn 0.1 )O 2 cathode material for LIBs via a solution method…”

mentioning

confidence: 99%

Research Progress on Applications of Polyaniline (PANI) for Electrochemical Energy Storage and Conversion

Gong

2020

Materials

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Conducting polyaniline (PANI) with high conductivity, ease of synthesis, high flexibility, low cost, environmental friendliness and unique redox properties has been extensively applied in electrochemical energy storage and conversion technologies including supercapacitors, rechargeable batteries and fuel cells. Pure PANI exhibits inferior stability as supercapacitive electrode, and can not meet the ever-increasing demand for more stable molecular structure, higher power/energy density and more N-active sites. The combination of PANI and other active materials like carbon materials, metal compounds and other conducting polymers (CPs) can make up for these disadvantages as supercapacitive electrode. As for rechargeable batteries and fuel cells, recent research related to PANI mainly focus on PANI modified composite electrodes and supported composite electrocatalysts respectively. In various PANI based composite structures, PANI usually acts as a conductive layer and network, and the resultant PANI based composites with various unique structures have demonstrated superior electrochemical performance in supercapacitors, rechargeable batteries and fuel cells due to the synergistic effect. Additionally, PANI derived N-doped carbon materials also have been widely used as metal-free electrocatalysts for fuel cells, which is also involved in this review. In the end, we give a brief outline of future advances and research directions on PANI.

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Enhanced Electrochemical Properties of Polyaniline-Coated LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Cited by 38 publications

References 32 publications

Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

In Situ Surface Modification for Improving the Electrochemical Performance of Ni‐Rich Cathode Materials by Using ZrP₂O₇

Research Progress on Applications of Polyaniline (PANI) for Electrochemical Energy Storage and Conversion

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Enhanced Electrochemical Properties of Polyaniline-Coated LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries

Cited by 38 publications

References 32 publications

Selective TiO2 Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

Selective TiO2 Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

In Situ Surface Modification for Improving the Electrochemical Performance of Ni‐Rich Cathode Materials by Using ZrP2O7

Research Progress on Applications of Polyaniline (PANI) for Electrochemical Energy Storage and Conversion

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Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

In Situ Surface Modification for Improving the Electrochemical Performance of Ni‐Rich Cathode Materials by Using ZrP₂O₇