High performance anode materials for Li ion battery

1. Advance Functional Nanohybrid Material Laboratory
Zaheer Ahmad
Group 1
I.D# 2022121044
Inorganic Chemistry

3. Contents
1. Introduction
2. Preparation of composite
3. Results and discussion
i). Morphological Analysis
ii). Electrochemical Measurements
4. Conclusions

4. 1. Introduction:
 Rechargeable lithium-ion batteries (LIBs) are the
most widely used battery system.
 Conventional graphite anodes exhibit a rather
small Li storage capacity far from satisfaction.
 Extensive research has been conducted on
various high-specific-capacity anode materials,
such as silicon, metal oxides, and two-
dimensional (2D) TMDs to further improve the
performance of LIBs.

5. Introduction:
As a representative TMD, Molybdenum disulfide (MoS2) provides a high
electrochemical performance when employed as a LIB anode.
Advantages:
 Higher Capacity
 Lower degree of volume expansion
 Better capacity retention
Disadvantages:
 Low electrical conductivity of 2H phase

6. Aim of work:
 To improve the conductivity of 2H-MoS2.
 MoS2 phase transition from the semiconducting 2H phase to the metallic 1T phase.
 Integrating MoS2 with highly conductive frameworks to form hybrid composites.

7. Schematic illustration of n-Buli treatment for MoS2/MXene nanohybrid
structures.
2. Preparation of n-BuLi-Treated MoS2/Ti3C2:
1. Preparation of Ti3C2MXene.
2. Synthesis of dual phase MoS2/Ti3C2
composite.
3. Preparation of n-BuLi-Treated MoS2/Ti3C2.

8. Figure 2. SEM (a) and TEM (b) images of the p-MT sample. HRTEM images of p-MT with the marked
interlayer distances of MoS2 flakes (c) and MXene sheets (d). (e,f) SEM and TEM images of the n-MT
nanohybrid. The interlayer distances of MoS2 and MXene are shown in (g,h), respectively.
3. Results and Discussion:
i). Morphological Analysis:

9. Figure 2. The SEM and EDS results of (a) p-MT and (b) n-MT.
3. Results and Discussion:
i). Morphological Analysis:

10. Figure 3. Raman spectra (a) and XRD patterns (b) of pristine and nBuli-treated MoS2/MXene hybrid structures.
3. Results and Discussion:
i). Morphological Analysis:

11. Figure 4. Deconvoluted XPS spectra of p-MT (top panel) and n-MT
(bottom panel), showing the binding energy of fluorine (a,d), molybdenum
(b,e), and sulfur (c,f).
Figure S5. The XPS complete survey of (a) p-MT and (b) n-MT.
3. Results and Discussion:
i). Morphological Analysis:

12. Figure 5 (a). GCD profiles of p-MT (a) and n-MT (b). The cycling performance of the 2D
nanohybrids (c). Rate performance of n-MT (d) and Nyquist plot of the 2D hybrids (e).
3. Results and Discussion:
ii). Electrochemical Measurements:
Figure 5 (b). The rate performance of (a) p-MT and (b) n-MT.

13. Table1. Performance comparison of MoS2 and MXene-based anodes.
3. Results and Discussion:
ii). Electrochemical Measurements:

14. 4. Conclusions:
In this work the authors
 Successfully prepared a 2D MoS2/Ti3C2 composite composed of 1T-phase-enriched MoS2 flakes.
 They demonstrated prelithiated nanohybrids exhibit a distinct surface morphology with higher-1T-metallic
phase MoS2 which are beneficial for the battery anode performance due to the enhanced electrical
conductivity
 Improved Li-ion storage capacity along with excellent cycle stability is achieved.
 An effective strategy for low-dimensional material structure−property engineering to optimize the battery
anode performance.
 Sheds light on the development of other 2D hybrid-based energy storage and conversion systems.

15. Thanks for your attention.
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