Hierarchically assembled LiNi0.8Co0.1Mn0.1O2 secondary particles with high exposure of {010} plane synthesized via co-precipitation method

Han, Yongkang; Shan, Xiaojian; Zhu, Guobin; Wang, Yan; Qu, Qunting; Zheng, Honghe

doi:10.1016/j.electacta.2019.135057

Cited by 39 publications

(20 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[19,20] Although these modification strategies have been adopted to significantly improve the above problems, most of them enhance electrochemical performance by sacrificing energy density and other additional costs. [21] In contrast, it is a more effective method to regulate the crystal directional growth and rationally design the crystal structure with specific exposed crystal facets, which can avoid the emergence of new problems such as low compacted density and high impurity contents caused by traditional modification strategies.…”

Section: Introductionmentioning

confidence: 99%

Engineering Crystal Orientation of Cathode for Advanced Lithium‐Ion Batteries: A Minireview

Zhu

Zhou

Yang

et al. 2022

The Chemical Record

View full text Add to dashboard Cite

Engineering crystal orientation has attracted widespread attention since it is related to the cyclability and rate performance of cathode materials for lithium‐ion batteries (LIBs). Regulating the crystal directional growth with optimal exposed crystal facets is an effective strategy to improve the performance of cathode materials, but still lacks sufficient attention in research field. Herein, we briefly introduce the characterization techniques and identification methods for crystal facets, then summarize and illuminate the major methods for regulating crystal orientation and their internal mechanism. Furthermore, the optimization strategies for layered‐, spinel‐, and olivine‐structure cathodes are discussed based on the characteristic of crystal structure, and the relationship between exposure of special crystal facets and lithium storage performance is deeply analyzed, which could guide the rational design of cathodes for LIBs.

show abstract

Section: Introductionmentioning

confidence: 99%

Engineering Crystal Orientation of Cathode for Advanced Lithium‐Ion Batteries: A Minireview

Zhu

Zhou

Yang

et al. 2022

The Chemical Record

View full text Add to dashboard Cite

show abstract

“…For nickel-rich ternary LiNi 1-x-y Co x Mn y O 2 materials, the Co and Mn ions are in the form of Co 3+ and Mn 4+ state respectively, while the oxidation state of Ni ions increases with decreasing Mn content [7]. When the Mn content is low, e.g., NCM811, most nickel ions are in the form of Ni 3+ , and therefore oxygen atmospheres are still required during preparation [25]. When the Mn content is high, e.g., LiNi 1/3 Mn 1/3 Co 1/3 O 2 and LiNi 0.5 Co 0.2 Mn 0.3 O 2 , it can usually be calcined in air to obtain a ternary material with a well-ordered layered structure [26,27].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Electrochemical Properties of LiNi2/3Co1/6Mn1/6O2 Cathode Material for Lithium-Ion Batteries

Zhu

Liu

et al. 2021

Materials

View full text Add to dashboard Cite

The cathode material LiNi2/3Co1/6Mn1/6O2 with excellent electrochemical performance was prepared successfully by a rheological phase method. The materials obtained were characterized by X-ray diffraction, scanning electron microscopy, electrochemical impedance spectroscopy and charge-discharge tests. The results showed that both calcination temperatures and atmosphere are very important factors affecting the structure and electrochemical performance of LiNi2/3Co1/6Mn1/6O2 material. The sample calcinated at 800 °C under O2 atmosphere displayed well-crystallized particle morphology, a highly ordered layered structure with low defects, and excellent electrochemical performance. In the voltage range of 2.8–4.3 V, it delivered capacity of 188.9 mAh g−1 at 0.2 C and 130.4 mAh g−1 at 5 C, respectively. The capacity retention also reached 93.9% after 50 cycles at 0.5 C. All the results suggest that LiNi2/3Co1/6Mn1/6O2 is a promising cathode material for lithium-ion batteries.

show abstract

“…Being eco-friendly and lightweight; possessing high power, energy density and long life cycle, lithium-ion batteries (LIBs) have been widely used as the power source in stationary energy storages, uninterruptible power supplies, and electronic devices. , However, conventional cathode materials such as LiCoO 2 , LiFePO 4 , and almost LiNi x Co y Mn 1– x – y O 2 cathode ( x < 0.5) are not able to satisfy the fast-growing demand for energy storage systems with high energy density. − Recently, LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811), with a reversible specific capacity of approximately 200 mA h g –1 , has been regarded as one of the most promising cathode materials for next-generation LIBs. , Despite some promising properties, high nickel content in the NCM811 cathode structure causes irreversible changes and poor structural stability. The relevant changes in NCM811 can be explained by some critical issues such as severe reduction of Ni 4+ , unstable lithium residues, rapid electrolyte depletion upon repeated charge–discharge processes and formation of the NiO-type phase, and intense oxygen gas release during cycling. − How to overcome these limitations is still a big challenge for the commercialization of the NCM811 cathode material.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance and Elevated Temperature Properties of the TiO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for High-Safety Li-Ion Batteries

Khollari

Azar

Esmaeili

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Nowadays, the LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode material has attracted great research interest due to its high energy density and less usage of costly raw materials. However, the high nickel content of NCM811 brings about an extremely unstable interface between the electrode and electrolyte and therefore inferior cyclic stability. Herein, we have proposed a straightforward method to deliver 1, 2, and 4 wt % of TiO 2 nanoparticles (NPs) on the surface of the NCM811 cathode material and to improve its properties at room and high temperatures. Based on scanning electron microscopy and transmission electron microscopy observations, the coating thickness varies from 10 to 35 nm and the 2 wt % TiO 2 -coated cathode is provided with uniformly distributed NPs that could result in an improved structural stability and electrochemical performance. In detail, at 25 and 55 °C and 1 C, the 2 wt % TiO 2 -coated cathode shows capacity retentions of 90.0 and 80.5% after 100 cycles, higher than those of pristine and coated cathodes. Under a high current rate of 10 C at 25 and 55 °C, the discharge capacities of the 2 wt % TiO 2 -coated cathode were 135.9 and 141.4 mA h g −1 , which are significantly higher than those of the pristine cathode material (128.3 and 89.1 mA h g −1 ). Results of the dissolution test at 55 °C reflect the effectiveness of the TiO 2 coating in maintaining the structural integrity of the cathode material and protecting it from HF attack and deleterious side reactions. Also, the differential scanning calorimetry result proves the enhanced safety after surface modification; the TiO 2 coating shifts the exothermic peak of the electrode from 231.1 to 242.9 °C. Therefore, surface modification with TiO 2 NPs can be proposed as a practical and cost-effective method for the commercial application of the high energy density NCM811 cathode at room and high temperatures. KEYWORDS: LiNi 0.8 Co 0.1 Mn 0.1 O 2 , nanocoating, TiO 2 , safety, cathode, lithium-ion batteries

show abstract

Hierarchically assembled LiNi0.8Co0.1Mn0.1O2 secondary particles with high exposure of {010} plane synthesized via co-precipitation method

Cited by 39 publications

References 52 publications

Engineering Crystal Orientation of Cathode for Advanced Lithium‐Ion Batteries: A Minireview

Engineering Crystal Orientation of Cathode for Advanced Lithium‐Ion Batteries: A Minireview

Preparation and Electrochemical Properties of LiNi2/3Co1/6Mn1/6O2 Cathode Material for Lithium-Ion Batteries

Electrochemical Performance and Elevated Temperature Properties of the TiO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for High-Safety Li-Ion Batteries

Contact Info

Product

Resources

About

Hierarchically assembled LiNi0.8Co0.1Mn0.1O2 secondary particles with high exposure of {010} plane synthesized via co-precipitation method

Cited by 39 publications

References 52 publications

Engineering Crystal Orientation of Cathode for Advanced Lithium‐Ion Batteries: A Minireview

Engineering Crystal Orientation of Cathode for Advanced Lithium‐Ion Batteries: A Minireview

Preparation and Electrochemical Properties of LiNi2/3Co1/6Mn1/6O2 Cathode Material for Lithium-Ion Batteries

Electrochemical Performance and Elevated Temperature Properties of the TiO2-Coated Li[Ni0.8Co0.1Mn0.1]O2 Cathode Material for High-Safety Li-Ion Batteries

Contact Info

Product

Resources

About

Electrochemical Performance and Elevated Temperature Properties of the TiO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for High-Safety Li-Ion Batteries