Ampcera® Lithium Niobium Oxide, LiNbO₃ (1wt%) coated NMC 811 Cathode Powder, 10g

Ampcera® LiNbO₃ (1 wt%)  coated NMC 811 Cathode Powder, 11-15um D50, Cathode Material, 10g

Product Benefit: LiNbO₃ coated NMC 811 (or NCM 811) Cathode Powder provides superior high rate capability of cathode when being used with solid state electrolyte materials.  According to a 2019 paper published by the M. Stanley Whittingham lab, the coating of LiNbO₃ on NMC 811 cathode not only supplied a protective surface coating but also optimized the electrochemical behavior of NMC 811 cathode material. 

Product Number (SKU#): PO0185

CAS#: NMC 811(1333-86-4), LiNbO3 (12031-63-9)

Package Size: 10g

Supplier: Ampcera Inc.

Specifications (Custom made cathode materials with LiNbO₃ coating can be provided by Ampcera Inc. upon request. Please contact us for a quote.)

LiNbO₃ coating: 1 wt% of NMC 811

Appearance: Ash black color powder

Molecular Formula: LiNi_0.8Co_0.10Mn_0.10O₂ (Ni:Mn:Co = 8:1:1), NMC 811

Material Type: Polycrystalline

Chemical Name or Material: Lithium Nickel Manganese Cobalt Oxide

Particle size distribution:

• D10: ~ 5 µm
• D50: 11 - 15 µm
• D90: 35 µm

Tap density: ~ 2.2 g/cm³ (typical value 2.45 g/cm³)

BET Specific Surface Area: 0.15 - 0.35 m²/g

LiNbO₃ coating thickness (TEM measurement): 5~10 nm

Chemical Composition and Impurities (metals only)

Electrochemical Performance of NMC 811 powder

Coulombic Efficiency (0.1C) >86%

First Discharge Capacity (button half open cell, 4.2 - 3.0V)

at 0.1C, 178 mAh/g, First discharge efficiency: ~ 85%

at 0.5C, 172 mAh/g

at 1.0C, 165 mAh/g

Capacity remaining

97% after 100 cycles

96% after 200 cycles

94% after 300 cycles

According to a recent study, LiNbO₃-coated NMC 811 cathode displays the higher discharge capacity of 203 mAh g−1 at 0.1 C and a rate performance of 136.8 mAh g−1 at 5 C at 60 °C than NMC 811 and reported oxide electrodes.

Reference: 

1. LiNbO₃-coated LiNi_0.8Co_0.1Mn_0.1O₂ cathode with high discharge capacity and rate performance for all-solid-state lithium battery, Journal of Energy Chemistry, Volume 40, January 2020, Pages 39-45 
2. Li-Nb-O coating/substitution enhances the electrochemical performance of LiNi_0.8Mn_0.1Co_0.1O₂ (NMC 811) Cathode, Fengxia Xin, Fengxia Xin, Hui Zhou, Xiaobo Chen, Mateusz Zuba, Natasha Chernova, Guangwen Zhou, M. Stanley Whittingham,  ACS Appl. Mater. Interfaces 2019, 11, 38, 34889-34894
3. Interfacial modification for high-power solid-state lithium batteries, Solid State Ionics, Volume 179, Issues 27–32, 30 September 2008, Pages 1333-1337