An effective modification strategy enhancing the structure stability and electrochemical performance of LiNi0.5Co0.2Mn0.3O2 cathode material for lithium-ion batteries

Yang, Zhilin; Cui, Can; Liu, Jie; Bei, Yiying; Li, Yingying; Zheng, Sining; Feng, Yaxin; Xu, Huifang; Tian, Suhuan; Song, Ye; Li, Fengsheng

doi:10.1016/j.jallcom.2021.161480

Cited by 23 publications

(10 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Co 2p and Mn 2p spectrum of the samples confirm that the valences of Co and Mn for NCMA88 and NCMA88@0.2B are + 3 and + 4, respectively (Figure S4). The peak of B 1s spectrum at 192.27 eV confirms existence of LiBO 2 , [27] as shown in Figure 2c. In order to further clarify the existence form of boron-containing compounds, the existence of LBO was detected by Fourier transform infra-red (FTIR).…”

Section: Resultsmentioning

confidence: 59%

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

et al. 2022

View full text Add to dashboard Cite

A facile mechanical mixing‐calcination method was employed to coat lithium metaborate onto LiNi0.88Co0.06Mn0.03Al0.03O2 cathode. Physical characterizations revealed that the coating layer was uniformly spread on the surface of the material particles, and did not alter the structure and morphology. Electrochemical measurements indicated that the surface‐modified cathode showed significantly improved cycling stability, both under room‐temperature and high‐temperature (50 °C). The coated sample delivered an initial discharge capacity of 211.0 mAh g−1 at 0.1 C, and a capacity retention of 87.5 % after 300 cycles at 1 C rate under room‐temperature. Meanwhile, it could maintain 97.2 % of initial capacity after 120 cycles at 1 C under 50 °C, which was much higher than the value of the pristine sample (only 37.2 %). The lithium‐ion diffusion kinetics was analyzed by electrochemical impedance spectroscopy. The coated material exhibits lower surface resistance and charge‐transfer resistance, as well as faster lithium‐ion diffusion than the pristine one. The materials were also characterized after cycling. The surface‐modified sample possessed more stable surficial and structural stability.

show abstract

Section: Resultsmentioning

confidence: 59%

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

et al. 2022

View full text Add to dashboard Cite

show abstract

“…One of the important points that can be expected from the X‐ray diffraction pattern in samples with NMC composition is the presence of double peaks (104/005) at 2 θ = 36 − 36° and (020/112) at 2 θ = 64 − 66° separately 30 . The presence of separated peaks indicates the placement of lithium ions and atoms in their proper place in the cathode powder and the formation of hexagonal layer structure 31‐33 . Another important point that can be used from the XRD results is the peak intensity ratio of (005) to (106) 34 .…”

Section: Resultsmentioning

confidence: 99%

“…30 The presence of separated peaks indicates the placement of lithium ions and atoms in their proper place in the cathode powder and the formation of hexagonal layer structure. [31][32][33] Another important point that can be used from the XRD results is the peak intensity ratio of (005) to (106). 34 In other words, this ratio indicates the ionic mixture between lithium and nickel ions for placement in the cathodic structure during discharge.…”

Section: Resultsmentioning

confidence: 99%

Experimental study and optimization of excess lithium in cathodic active materials with Li _x (Ni _0. ₃ Mn ₀ _. ₅ Co ₀

Bashirpour‐Bonab

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary In this experimental research, in order to obtain the effect of excess lithium in the cathode lithium ionization stage in a nonstoichiometric manner, the cathode precursor with (Ni0.3Mn0.5Co0.2) composition was synthesized as hydroxide using the co‐precipitation process. Then, lithium was added with different amounts of lithium hydroxide (LiOH) to investigate the effect of excess lithium in the Lix(Ni0.3Mn0.5Co0.2)O2 composition on the electrochemical properties of the cathode. The results of battery charge–discharge tests for all three synthesized samples at rates of 5C‐0.5 indicate that the sample Li1.5(Ni0.3Mn0.5Co0.2)O2 has the best electrochemical performance. So that at 1C discharge rate, its capacity was 200 mAh/g, and after 30 cycles, its capacity reached 138 mAh/g with a 5C discharge rate. The electrochemical impedance analysis showed that the sample Li1.5(Ni0.3Mn0.5Co0.2)O2 has the lowest internal resistance. The results show that increasing the amount of excess lithium is optimal for improving battery performance. In nonstoichiometric mode, increasing the amount of lithium to Li1.5 has been associated with improved performance and above this value leads to a decrease in battery performance.

show abstract

“…At present, in the field of energy-storage devices, lithium-ion batteries (LIBs) gradually replace other energy-storage batteries (lead acid batteries, nickel-cadmium batteries) due to their characteristics of high specific energy density, high operating voltage, long cycle life, and environmental protection. [1][2][3][4] Because the specific capacity limit of lithium battery is more related to the cathode material, the cathode material is considered to be the most critical material in LIBs. Finding excellent cathode materials with long cycle life, excellent energy density, and high rate performance has always been the focus of researchers.…”

Section: Introductionmentioning

confidence: 99%

Coordination Anchoring Effect Promoting the Interfacial Stability and Electrochemical Performance of LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Material for Lithium‐Ion Batteries

Zhang

et al. 2022

Energy Tech

Self Cite

View full text Add to dashboard Cite

LiNi0.8Co0.1Mn0.1O2 (NCM811), as a typical nickel‐rich ternary material, has attracted wide attention due to its high discharge specific capacity. However, the strict storage environment and interface instability caused by residual alkali on the surface limit the further development. Surface coating is usually used to modify the surface of cathode materials to improve interface stability. However, traditional inorganic coating is easy to fall off due to a lack of stable chemical bonding, and the interaction force of previous organic coating has not been thoroughly studied. Herein, polyvinyl pyrrolidone with carbonyl functional groups is introduced on the surface of NCM811, and the carbonyl group forms strong coordination bonds with transition metal ions, that is, the organic coating layer forms stable coordination anchoring with the cathode material, which greatly reduces the situation where the coating layer is easy to fall off. At the same time, the implanted organic coating can inhibit the dissolution of transition metal ions and mitigate the side reaction. The results show that the capacity retention rate of the modified material reaches 86.82% after 50 cycles at 1 C rate. This novel surface modification strategy provides a new insight for the modification of high‐nickel cathode materials.

show abstract

An effective modification strategy enhancing the structure stability and electrochemical performance of LiNi0.5Co0.2Mn0.3O2 cathode material for lithium-ion batteries

Cited by 23 publications

References 38 publications

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Experimental study and optimization of excess lithium in cathodic active materials with Li _x (Ni _0. ₃ Mn ₀ _. ₅ Co ₀

Coordination Anchoring Effect Promoting the Interfacial Stability and Electrochemical Performance of LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Material for Lithium‐Ion Batteries

Contact Info

Product

Resources

About

An effective modification strategy enhancing the structure stability and electrochemical performance of LiNi0.5Co0.2Mn0.3O2 cathode material for lithium-ion batteries

Cited by 23 publications

References 38 publications

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

Experimental study and optimization of excess lithium in cathodic active materials with Li x (Ni 0. 3 Mn 0 . 5 Co 0

Coordination Anchoring Effect Promoting the Interfacial Stability and Electrochemical Performance of LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium‐Ion Batteries

Contact Info

Product

Resources

About

Experimental study and optimization of excess lithium in cathodic active materials with Li _x (Ni _0. ₃ Mn ₀ _. ₅ Co ₀

Coordination Anchoring Effect Promoting the Interfacial Stability and Electrochemical Performance of LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Material for Lithium‐Ion Batteries