Employment Agreement, dated as of June 15, 2023, by and between Kang Xu and SolidEnergy Systems, LLC

Exhibit 10.10

​

​

Re:Employment as Chief Scientist

Dear Kang Xu:

Welcome to SolidEnergy!

I am pleased to confirm the terms on which you will be employed by SolidEnergy Systems LLC (the "Company'').

1.Position. You will serve as Chief Scientist of the Company reporting directly to Qichao Hu, Chief Executive Officer. Your duties initially will include, but not be limited to, collaborating with external research organizations; contributing to fundamental science and electrolyte development; contributing to anode and cathode development. As a fulJ-time employee of the Company, you will be expected to devote your full business time and energies to the business and affairs of the Company. Your office will be initially located at 35 Cabot Road, Woburn, MA 01801.

2.Starting Date. lt is expected that your employment will begin on August I, 2023 (the "Start Date").

3.Base Salary. As an employee of the Company, you will be paid a salary at a rate of $19,231 per bi-weekly ($500,000 per annum).

4.Performance Bonus Compensation. During your employment, you may be considered annually for a performance bonus. Performance bonus compensation in any year, if any, will be determined by the Compensation Committee of the Board of Directors (the "Compensation Committee") of SES AI Corporation, the ultimate parent company of the Company ("SES") based on your performance and that of the Company, relative to miJe!.iones to be agreed upon between you and the Compensation Committee, and otherwise in accordance with a general employee bonus program. The Performance Bonus cash compensation is expected to be up to 20% of your Base Salary as at the end of your first year on August 1, 2024. The perfonnance bonus is typically paid out in April of the year following your start date.

5.Equity Compensation. For your first year of service, the Company agrees to recommend to the Compensation Committee a grant to you of restricted stock units or shares of restricted stock equivalent to $500,000 in value as of the date of grant with such grant to be made pursuant to SES AI Corporation's standard form Restricted Stock or Restricted Stock Unit Award and with terms of vesting being generally comparable to persons of equivalent rank and seniority in the Company. The terms of this stock award

​

​

will be set forth in a separate restricted stock award agreement. In the event of any ambiguity between this letter agreement and the restricted stock award agreement, the restricted stock award agreement shall govern.

6.Benefits; Vacation; Withholding. You will be entitled to participate in health, insurance, pension, and other benefits provided to other executives of the Company of similar seniority on terms no less favorable than those available to such executives of the Company generally. Your participation will be subject to the terms of the applicable plan documents and generally applicable Company policies. The Company retains the right to change, add or terminate any particular benefit.

If you are moving from outside of Massachusetts, you will be entitled to receive a one-time relocation reimbursement of up to $25,000. Should you leave the Company for any reason within 24 months of the Start Date, you will repay the relocation reimbursement to the Company in full within 30 days of the separation date.

You will be entitled to earn vacation in accordance with the Company's policies from time to time in effect, in addition to holidays observed by the Company, subject to a minimum entitlement of2 weeks' vacation and 10 paid holidays per year. Vacation may be taken at such times and intervals as you shall determine, subject to the business needs of the Company, and otherwise shall be subject to the policies of the Company, as in effect from time to time.

You understand that the Company will deduct from any payments it otherwise is to make to you pursuant to the terms of this letter agreement or otherwise any withholding taxes and other deductions required by law.

(a)Your employment with the Company is an uat-will" employment and may be terminated by either party at any time for any reason, with or without cause, without notice and without any further compensation.

(b)Except for any right you may have under applicable law to continue participation in the Company's group health and dental plans under COBRA, or any successor law, benefits shall terminate in accordance with the terms of the applicable benefit plans based on the date of termination of your employment or the last day of the severance period, whichever occurs later.

(c)Vcsting of any restricted shares or share options, which the Company may have granted to you, shall cease immediately upon any termination of your employment with the Company for any reason.

​

(d)Provisions of this letter agreement shall survive any termination if so provided in this letter agreement or if necessary or desirable to accomplish the purposes of other surviving provisions, including, without limitation, your obligations under the Confidentiality, Assignment of Intellectual Property and Noncompetition Agreement, which you will execute as a condition to your employment under this letter agreement.

8.Conditions to Employment. You agree that the following items are conditions to your employment with the Company:

(a)The Immigration Reform and Control Act of 1986 requires employers to verify the employment eligibility and identity of new employees by requiring such employees to complete an Employment Eligibility Form 1-9, which is enclosed. Please complete and return it and the appropriate required documents listed on the form. This offer of employment is contingent upon compliance with the Immigration Act of 1986.

(b)Your execution and delivery of the enclosed Employee's Confidentiality, Assignment of Intellectual Property and Noncompetition Agreement.

This ofter of employment will expire on June 30, 2023, unless accepted by you prior to such date.

We look forward to your service with the Company and are pleased that you will be working with us.

Sincerely,

​

​

​

​

​