Ping He

Collaborative Innovation Center of Advanced Microstructures

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Haoshen Zhou

Collaborative Innovation Center of Advanced Microstructures

Yu Qiao

Collaborative Innovation Center of Chemistry for Energy Materials

Shaohua Guo

Nanjing University

Sixie Yang

Nanjing University

Hui Pan

Collaborative Innovation Center of Advanced Microstructures

Huijun Yang

National Institute of Advanced Industrial Science and Technology

Zhi Chang

Central South University

Kezhu Jiang

Hebei University of Technology

Shichao Wu

Chinese Academy of Sciences

Xiaowei Mu

Nanjing University of Science and Technology

Cooperative Institutions

Nanjing University

Collaborative Innovation Center of Advanced Microstructures

Chinese Academy of Sciences

Shanghai Jiao Tong University

National Institute of Advanced Industrial Science and Technology

University of Chinese Academy of Sciences

Huazhong University of Science and Technology

University of Tsukuba

Soochow University

Fudan University

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Coordination structure regulation of Pt-N O -S1 catalytic sites for promoting high-efficiency hydrogen evolution

Journal of Energy Chemistry (2024)

Minmin Wang Chao Feng Xin Zhang Ping He Houyu Zhu

10.1016/j.jechem.2024.11.027

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Citations (0)

A Concentrated Ternary‐Salts Electrolyte for High Reversible Li Metal Battery with Slight Excess Li

Advanced Energy Materials (2018)

Feilong Qiu Xiang Li Han Deng Di Wang Xiaowei Mu

Abstract Li metal can potentially deliver much higher specific capacity than commercially used anodes. Nevertheless, because of its poor reversibility, abundant excess Li (usually more than three times) is required in Li metal batteries, leading to higher costs and decreased energy density. Here, a concentrated lithium bis(trifluoromethane sulfonyl) imide (LiTFSI)–lithium nitrate (LiNO 3 )–lithium bis(fluorosulfonyl)imide (LiFSI) ternary‐salts electrolyte is introduced to realize a high stable Li metal full‐cell with only a slight excess of Li. LiNO 3 and LiFSI contribute to the formation of stable Li 2 O–LiF‐rich solid electrolyte interface layers, and LiTFSI helps to stabilize the electrolyte under high concentration. Li metal in the electrolyte remains stable over 450 cycles and the average Coulombic efficiency reaches 99.1%. Moreover, with 0.5 × excess Li metal, the Coulombic efficiency of Li metal in the LiTFSI–LiNO 3 –LiFSI reaches 99.4%. The electrolyte also presents high stability to the LiFePO 4 cathode, the capacity retention after 500 cycles is 92.0% and the Coulombic efficiency is 99.8%. A Li metal full‐cell with only 0.44 × excess Li is also assembled, it remains stable over 70 cycles and 83% of the initial capacity is maintained after 100 cycles.

Lithium metal

10.1002/aenm.201803372

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Citations (217)

The Development of a New Type of Rechargeable Batteries Based on Hybrid Electrolytes

ChemSusChem (2010)

Haoshen Zhou Yonggang Wang Huiqiao Li Ping He

Abstract Lithium ion batteries (LIBs), which have the highest energy density among all currently available rechargeable batteries, have recently been considered for use in hybrid electric vehicles (HEVs), plug‐in hybrid electric vehicles (PHEVs), and pure electric vehicles (PEV). A major challenge in this effort is to increase the energy density of LIBs to satisfy the industrial needs of HEVs, PHEVs, and PEVs. Recently, new types of lithium–air and lithium–copper batteries that employ hybrid electrolytes have attracted significant attention; these batteries are expected to succeed lithium ion batteries as next‐generation power sources. Herein, we review the concept of hybrid electrolytes, as well as their advantages and disadvantages. In addition, we examine new battery types that use hybrid electrolytes.

Energy density

10.1002/cssc.201000123

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Citations (93)

Reversible Lithium‐Ion Uptake in Poly(methylmethacrylate) Thin‐Film via Lithiation/Delithiation at In Situ Formed Intramolecular Cyclopentanedione

Advanced Energy Materials (2016)

Yan Wang Li Zhang Liya Zhang Fei Zhang Ping He

Herein, it is proposed that poly(methylmethacrylate) (PMMA), a widely‐used thermoplastic in our daily life, can be used as an abundant, stable, and high‐performance anode material for rechargeable lithium‐ion batteries through a novel concept of lithium storage mechanism. The specially‐designed PMMA thin‐film electrode exhibits a high reversible capacity of 343 mA h g −1 at C/25 and maintains a capacity retention of 82.6% of that obtained at C/25 when cycled at 1 C rate. Meanwhile, this pristine PMMA electrode without binder and conductive agents shows a high reversible capacity of 196.8 mA h g −1 after 150 cycles at 0.2 C with a capacity retention of 73.5%. Additionally, PMMA‐based binder is found to enhance both the reversible capacity and rate capability of the graphite electrodes. Hence, this new type of organic electrode material may have a great opportunity to be utilized as the active material or rechargeable binder in flexible or transparent thin‐film batteries and all‐solid batteries. The present work also provides a new way of seeking more proper organic electrode materials which don't contain conjugated structures and atoms with lone pair electrons required in traditional organic electrode materials.

10.1002/aenm.201601375

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Citations (46)

Dilution of the Electron Density in the π‐Conjugated Skeleton of Organic Cathode Materials Improves the Discharge Voltage

ChemSusChem (2020)

Gaole Dai Yehua Gao Zhihui Niu Ping He Xiaohong Zhang

Organic compounds are promising candidates as battery materials because they can be sourced from sustainable resources, have tunable structures, and are cheap. However, the working voltage of battery cells containing organic compounds as positive electrodes is relatively lower than that of those containing an inorganic counterpart. In this work, a strategy was developed to increase the discharge voltage of battery cells by diluting the electron density of N-based redox centers in conjugated organic materials. In electron-rich heterocyclic compounds that utilize N as the redox center, pentatomic rings such as carbazole derivatives exhibited a higher atomic-dipole-moment-corrected Hirshfeld charge population compared with hexatomic rings, which led to a significant increase in the oxidation potential. As a result, polymeric indolocarbazole derivatives showed a high discharge voltage of 3.7-4.3 V vs. Li+ /Li and good cycling performance. Such a strategy can be used to design high-voltage organic electrode materials containing other redox centers.

Organic radical battery

Carbazole

10.1002/cssc.201903502

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Citations (38)

A phase-transition-free cathode for sodium-ion batteries with ultralong cycle life

Nano Energy (2018)

Kezhu Jiang Sheng Xu Shaohua Guo Xiaoyu Zhang Xueping Zhang

Sodium-ion battery

10.1016/j.nanoen.2018.07.042

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Citations (67)

Step-by-step desolvation enables high-rate and ultra-stable sodium storage in hard carbon anodes

Proceedings of the National Academy of Sciences (2022)

Ziyang Lu Chuannan Geng Huijun Yang Ping He Shichao Wu

Hard carbon is regarded as the most promising anode material for sodium-ion (Na-ion) batteries, owing to its advantages of high abundance, low cost, and low operating potential. However, the rate capability and cycle life span of hard carbon anodes are far from satisfactory, severely hindering its industrial applications. Here, we demonstrate that the desolvation process defines the Na-ion diffusion kinetics and the formation of a solid electrolyte interface (SEI). The 3A zeolite molecular sieve film on the hard carbon is proposed to develop a step-by-step desolvation pathway that effectively reduces the high activation energy of the direct desolvation process. Moreover, step-by-step desolvation yields a thin and inorganic-dominated SEI with a lower activation energy for Na+ transport. As a result, it contributes to greatly improved power density and cycling stability for both ester and ether electrolytes. When the above insights are applied, the hard carbon anode achieves the longest life span and minimum capacity fading rate at all evaluated current densities. Moreover, with the increase in current densities, an improved plateau capacity ratio is observed. This step-by-step desolvation strategy comprehensively enhances various properties of hard carbon anodes, which provides the possibility of building practical Na-ion batteries with high power density, high energy density, and durability.

Carbon fibers

Power density

10.1073/pnas.2210203119

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Citations (90)

A Safe Organic Oxygen Battery Built with Li‐Based Liquid Anode and MOFs Separator

Advanced Energy Materials (2020)

Han Deng Zhi Chang Feilong Qiu Yu Qiao Huijun Yang

Abstract Safe rechargeable batteries of improved energy density and high power performance are urgently needed for the development of large electric devices. Herein, an Li‐based organic liquid anode is proposed, and an organic oxygen battery with a metal organic framework membrane separator is realized, which is able to conduct Li ions and separate other large species in the system. Equipped with the dual redox mediator strategy, the organic oxygen battery exhibits superior rate performance with long cycling life and low overpotential. A “solid electrolyte interface”‐like layer is observed between the organic liquid anode and the ion conducting separator. This work not only introduces a new type of anode for Li‐based batteries, but also provides fundamental insights for the better application of biphenyl‐based liquid anodes.

Separator (oil production)

Overpotential

Organic radical battery

10.1002/aenm.201903953

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Citations (41)

Achieving long cycle life for all-solid-state rechargeable Li-I2 battery by a confined dissolution strategy

Nature Communications (2022)

Zhu Cheng Hui Pan Fan Li Chun Ying Duan Huan Liu

Rechargeable Li-I2 battery has attracted considerable attentions due to its high theoretical capacity, low cost and environment-friendliness. Dissolution of polyiodides are required to facilitate the electrochemical redox reaction of the I2 cathode, which would lead to a harmful shuttle effect. All-solid-state Li-I2 battery totally avoids the polyiodides shuttle in a liquid system. However, the insoluble discharge product at the conventional solid interface results in a sluggish electrochemical reaction and poor rechargeability. In this work, by adopting a well-designed hybrid electrolyte composed of a dispersion layer and a blocking layer, we successfully promote a new polyiodides chemistry and localize the polyiodides dissolution within a limited space near the cathode. Owing to this confined dissolution strategy, a rechargeable and highly reversible all-solid-state Li-I2 battery is demonstrated and shows a long-term life of over 9000 cycles at 1C with a capacity retention of 84.1%.

10.1038/s41467-021-27728-0

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Citations (78)

Controllable Hydrogen Generation from Water

ChemSusChem (2010)

Yonggang Wang Huiqiao Li Ping He Haoshen Zhou

The Lith′ing Daylights: The direct chemical reaction between lithium and water is employed as a controllable electrochemical reaction in a lithium–water cell to generate H2 gas. The hydrogen generation can be easily controlled by adjusting the current density of the external circuit or discharge time. Lithium-metal production using solar energy and controllable hydrogen generation from such electrochemical cells may provide a new avenue for sustainable hydrogen generation. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

Energy density

10.1002/cssc.201000049

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Citations (24)